Maluckov, Aleksandra

 Authority Key Name Variants orcid::0000-0002-6474-360X Maluckov, Aleksandra (94)
Projects
 Photonics of micro and nano structured materials Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200017 (University of Belgrade, Institute of Nuclear Sciences 'Vinča', Belgrade-Vinča) Development of new information and communication technologies, based on advanced mathematical methods, with applications in medicine, telecommunications, power systems, protection of national heritage and education Development and implementation of next generation systems, equipments, and software based on software defined radio for radio and radar networks Ministry of Science, Serbia [141034], German-Israel Foundation [149/2006] Capturing and quantitative analysis of multi-scale multi-channel diagnostic data. Institute for Basic Science in Korea [IBS-R024-D1] Institute for Basic Science in Korea [IBS-R024-Y1] ational Research Foundation (NRF) of South Africa COST Action 1205, Advances in Optofluidics: Integration of Optical Control and Photonics with Microfluidics German-Israel Foundation [I-1024-2.7/2009] IBS (IBS-R024-D1) Indian National Science Academy (INSA) The influence of elementary excitations and conformations to physical properties of the new materials based on strongly correlated low-dimensional systems Institute for Basic Science in Korea (IBS-R024-Y1) Ministry of Science, Serbia [141034] National Science Foundation - NSF [DMS-1809074] National Science Foundation (US) [2015616], Binational Science Foundation (US-Israel) [2015616], Institute for Basic Science, South Korea [IBS-R024-D1] Programa ICM Millennium Institute for Research in Optics (MIRO) Russian Ministry of Science and Education (14.Y26.31.0017) United States Department of Energy (DOE) [DEAC52-06NA25396] Australian Research Council [DE190100430] Australian Research Council [Grant No. DE190100430] Bilateral Germany-Serbian project [451-03-01732/2017-09/15] Bilateral Germany-Serbian project (DAAD Project) [57393601] China Scholarship Council Comision Nacional de Investigacion Cientifica y Technologica (CONICYT PAI Grant) [77180003] CONICYT FONDECYT (No.1191205) COST Action [CA16221] Engineering and Physical Sciences Research Council (project UNLOC), Ministry of Education and Science of the Russian Federation [14.B25.31.0003], U.S. Department of Energy at the Lawrence Livermore National Laboratory [DE-AC52-08NA28752]

Author's Bibliography

Bend-free multiarm interferometers on optical chips

(2022)

TY  - JOUR
AU  - Petrović, Jovana
AU  - Maluckov, Aleksandra
AU  - Stojanović, Nikola
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10462
AB  - Multiarm interferometers can enhance measurement precision and provide multiparameter capability to the measurement. Their realisation requires multiport beam splitters, which has been a long-standing challenge in free-space and integrated optics. Here, we propose a new type of multiport interferometers suitable for implementation on optical chips. Their prospective advantages over the standard directional-coupler architectures: an arbitrary number of arms, planar architecture and two orders of magnitude reduction in footprint, are achieved by the layout based exclusively on the finite modulated photonic lattices. The inverse design of photonic lattices is facilitated by restricting the light propagation to periodic patterns. The corresponding interferometer model predicts the maximum $$1/\sqrt{N}$$sensitivity scaling with the number of arms N. While the presented design solutions are ubiquitous to all implementations, the advantages are discussed in both the low and high refractive-index contrast platforms. Finally, we provide an outlook on the possibilities for the interferometer applications in distributed classical and quantum measurements.
T2  - Optical and Quantum Electronics
T1  - Bend-free multiarm interferometers on optical chips
VL  - 54
IS  - 11
SP  - 687
DO  - 10.1007/s11082-022-04048-1
ER  - 
@article{
author = "Petrović, Jovana and Maluckov, Aleksandra and Stojanović, Nikola",
year = "2022",
abstract = "Multiarm interferometers can enhance measurement precision and provide multiparameter capability to the measurement. Their realisation requires multiport beam splitters, which has been a long-standing challenge in free-space and integrated optics. Here, we propose a new type of multiport interferometers suitable for implementation on optical chips. Their prospective advantages over the standard directional-coupler architectures: an arbitrary number of arms, planar architecture and two orders of magnitude reduction in footprint, are achieved by the layout based exclusively on the finite modulated photonic lattices. The inverse design of photonic lattices is facilitated by restricting the light propagation to periodic patterns. The corresponding interferometer model predicts the maximum $$1/\sqrt{N}$$sensitivity scaling with the number of arms N. While the presented design solutions are ubiquitous to all implementations, the advantages are discussed in both the low and high refractive-index contrast platforms. Finally, we provide an outlook on the possibilities for the interferometer applications in distributed classical and quantum measurements.",
journal = "Optical and Quantum Electronics",
title = "Bend-free multiarm interferometers on optical chips",
volume = "54",
number = "11",
pages = "687",
doi = "10.1007/s11082-022-04048-1"
}
Petrović, J., Maluckov, A.,& Stojanović, N.. (2022). Bend-free multiarm interferometers on optical chips. in Optical and Quantum Electronics, 54(11), 687.
https://doi.org/10.1007/s11082-022-04048-1
Petrović J, Maluckov A, Stojanović N. Bend-free multiarm interferometers on optical chips. in Optical and Quantum Electronics. 2022;54(11):687.
doi:10.1007/s11082-022-04048-1 .
Petrović, Jovana, Maluckov, Aleksandra, Stojanović, Nikola, "Bend-free multiarm interferometers on optical chips" in Optical and Quantum Electronics, 54, no. 11 (2022):687,
https://doi.org/10.1007/s11082-022-04048-1 . .

Nonlinear signatures of Floquet band topology

(2022)

TY  - JOUR
AU  - Maluckov, Aleksandra
AU  - Smolina, Ekaterina
AU  - Leykam, Daniel
AU  - Gündoğdu, Sinan
AU  - Angelakis, Dimitris G.
AU  - Smirnova, Daria A.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10236
AB  - We study how the nonlinear propagation dynamics of bulk states may be used to distinguish topological phases of slowly driven Floquet lattices. First, we show how instabilities of nonlinear Bloch waves may be used to populate Floquet bands and measure their Chern number via the emergence of nontrivial polarization textures in a similar manner to static (undriven) lattices. Second, we show how the nonlinear dynamics of nonstationary superposition states may be used to identify dynamical symmetry inversion points in the intracycle dynamics, thereby allowing anomalous Floquet phases to be distinguished from the trivial phase. The approaches may be readily implemented using light propagation in nonlinear waveguide arrays.
T2  - Physical Review B
T1  - Nonlinear signatures of Floquet band topology
VL  - 105
IS  - 11
SP  - 115133
DO  - 10.1103/PhysRevB.105.115133
ER  - 
@article{
author = "Maluckov, Aleksandra and Smolina, Ekaterina and Leykam, Daniel and Gündoğdu, Sinan and Angelakis, Dimitris G. and Smirnova, Daria A.",
year = "2022",
abstract = "We study how the nonlinear propagation dynamics of bulk states may be used to distinguish topological phases of slowly driven Floquet lattices. First, we show how instabilities of nonlinear Bloch waves may be used to populate Floquet bands and measure their Chern number via the emergence of nontrivial polarization textures in a similar manner to static (undriven) lattices. Second, we show how the nonlinear dynamics of nonstationary superposition states may be used to identify dynamical symmetry inversion points in the intracycle dynamics, thereby allowing anomalous Floquet phases to be distinguished from the trivial phase. The approaches may be readily implemented using light propagation in nonlinear waveguide arrays.",
journal = "Physical Review B",
title = "Nonlinear signatures of Floquet band topology",
volume = "105",
number = "11",
pages = "115133",
doi = "10.1103/PhysRevB.105.115133"
}
Maluckov, A., Smolina, E., Leykam, D., Gündoğdu, S., Angelakis, D. G.,& Smirnova, D. A.. (2022). Nonlinear signatures of Floquet band topology. in Physical Review B, 105(11), 115133.
https://doi.org/10.1103/PhysRevB.105.115133
Maluckov A, Smolina E, Leykam D, Gündoğdu S, Angelakis DG, Smirnova DA. Nonlinear signatures of Floquet band topology. in Physical Review B. 2022;105(11):115133.
doi:10.1103/PhysRevB.105.115133 .
Maluckov, Aleksandra, Smolina, Ekaterina, Leykam, Daniel, Gündoğdu, Sinan, Angelakis, Dimitris G., Smirnova, Daria A., "Nonlinear signatures of Floquet band topology" in Physical Review B, 105, no. 11 (2022):115133,
https://doi.org/10.1103/PhysRevB.105.115133 . .
 1 1

Nonlinear compact localized modes in flux-dressed octagonal-diamond lattice

(2022)

TY  - JOUR
AU  - Stojanović, Mirjana G.
AU  - Gundogdu, Sinan
AU  - Leykam, Daniel
AU  - Angelakis, Dimitris G.
AU  - Stojanović Krasić, Marija
AU  - Stepić, Milutin
AU  - Maluckov, Aleksandra
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10197
AB  - Tuning the values of artificial flux in the two-dimensional octagonal-diamond lattice drives topological phase transitions, including between singular and non-singular flatbands. We study the dynamical properties of nonlinear compact localized modes that can be continued from linear flatband modes. We show how the stability of the compact localized modes can be tuned by the nonlinearity strength or the applied artificial flux. Our model can be realized using ring resonator lattices or nonlinear waveguide arrays.
T2  - Physica Scripta
T1  - Nonlinear compact localized modes in flux-dressed octagonal-diamond lattice
VL  - 97
IS  - 3
SP  - 030006
DO  - 10.1088/1402-4896/ac5357
ER  - 
@article{
author = "Stojanović, Mirjana G. and Gundogdu, Sinan and Leykam, Daniel and Angelakis, Dimitris G. and Stojanović Krasić, Marija and Stepić, Milutin and Maluckov, Aleksandra",
year = "2022",
abstract = "Tuning the values of artificial flux in the two-dimensional octagonal-diamond lattice drives topological phase transitions, including between singular and non-singular flatbands. We study the dynamical properties of nonlinear compact localized modes that can be continued from linear flatband modes. We show how the stability of the compact localized modes can be tuned by the nonlinearity strength or the applied artificial flux. Our model can be realized using ring resonator lattices or nonlinear waveguide arrays.",
journal = "Physica Scripta",
title = "Nonlinear compact localized modes in flux-dressed octagonal-diamond lattice",
volume = "97",
number = "3",
pages = "030006",
doi = "10.1088/1402-4896/ac5357"
}
Stojanović, M. G., Gundogdu, S., Leykam, D., Angelakis, D. G., Stojanović Krasić, M., Stepić, M.,& Maluckov, A.. (2022). Nonlinear compact localized modes in flux-dressed octagonal-diamond lattice. in Physica Scripta, 97(3), 030006.
https://doi.org/10.1088/1402-4896/ac5357
Stojanović MG, Gundogdu S, Leykam D, Angelakis DG, Stojanović Krasić M, Stepić M, Maluckov A. Nonlinear compact localized modes in flux-dressed octagonal-diamond lattice. in Physica Scripta. 2022;97(3):030006.
doi:10.1088/1402-4896/ac5357 .
Stojanović, Mirjana G., Gundogdu, Sinan, Leykam, Daniel, Angelakis, Dimitris G., Stojanović Krasić, Marija, Stepić, Milutin, Maluckov, Aleksandra, "Nonlinear compact localized modes in flux-dressed octagonal-diamond lattice" in Physica Scripta, 97, no. 3 (2022):030006,
https://doi.org/10.1088/1402-4896/ac5357 . .
 1

Topological charge switch in active multi-core fibers

(2021)

TY  - JOUR
AU  - Beličev, Petra
AU  - Gligorić, Goran
AU  - Maluckov, Aleksandra
AU  - Turitsyn, Sergei
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9869
AB  - Topological properties can make light field remarkably robust to various external perturbations. The ability to control and change on demand topological characteristics of light paves the way to new interesting physical phenomena and applications. Here, numerical modelling design of the device based on active multi-core fiber that can change topological charge of the state of light has been proposed. The concept is based on the nonlinear dynamics of optical vortices in active multi-core optical fiber with linearly coupled cores, saturated gain, and constant linear losses. Results demonstrate that the proposed system can provide change of the topological charge of vortices.
T2  - Annalen der Physik
T1  - Topological charge switch in active multi-core fibers
VL  - 533
IS  - 9
SP  - 2100108
DO  - 10.1002/andp.202100108
ER  - 
@article{
author = "Beličev, Petra and Gligorić, Goran and Maluckov, Aleksandra and Hadžievski, Ljupčo and Turitsyn, Sergei",
year = "2021",
abstract = "Topological properties can make light field remarkably robust to various external perturbations. The ability to control and change on demand topological characteristics of light paves the way to new interesting physical phenomena and applications. Here, numerical modelling design of the device based on active multi-core fiber that can change topological charge of the state of light has been proposed. The concept is based on the nonlinear dynamics of optical vortices in active multi-core optical fiber with linearly coupled cores, saturated gain, and constant linear losses. Results demonstrate that the proposed system can provide change of the topological charge of vortices.",
journal = "Annalen der Physik",
title = "Topological charge switch in active multi-core fibers",
volume = "533",
number = "9",
pages = "2100108",
doi = "10.1002/andp.202100108"
}
Beličev, P., Gligorić, G., Maluckov, A., Hadžievski, L.,& Turitsyn, S.. (2021). Topological charge switch in active multi-core fibers. in Annalen der Physik, 533(9), 2100108.
https://doi.org/10.1002/andp.202100108
Beličev P, Gligorić G, Maluckov A, Hadžievski L, Turitsyn S. Topological charge switch in active multi-core fibers. in Annalen der Physik. 2021;533(9):2100108.
doi:10.1002/andp.202100108 .
Beličev, Petra, Gligorić, Goran, Maluckov, Aleksandra, Hadžievski, Ljupčo, Turitsyn, Sergei, "Topological charge switch in active multi-core fibers" in Annalen der Physik, 533, no. 9 (2021):2100108,
https://doi.org/10.1002/andp.202100108 . .

Thermalization in the one-dimensional Salerno model lattice

(2021)

TY  - JOUR
AU  - Mithun, Thudiyangal
AU  - Maluckov, Aleksandra
AU  - Manda, Bertin Many
AU  - Skokos, Charalampos
AU  - Bishop, Alan
AU  - Khare, Avinash
AU  - Kevrekidis, Panayotis G
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9658
AB  - The Salerno model constitutes an intriguing interpolation between the integrable Ablowitz-Ladik (AL) model and the more standard (nonintegrable) discrete nonlinear Schrödinger (DNLS) one. The competition of local on-site nonlinearity and nonlinear dispersion governs the thermalization of this model. Here, we investigate the statistical mechanics of the Salerno one-dimensional lattice model in the nonintegrable case and illustrate the thermalization in the Gibbs regime. As the parameter interpolating between the two limits (from DNLS toward AL) is varied, the region in the space of initial energy and norm densities leading to thermalization expands. The thermalization in the non-Gibbs regime heavily depends on the finite system size; we explore this feature via direct numerical computations for different parametric regimes. © 2021 American Physical Society.
T2  - Physical Review E
T1  - Thermalization in the one-dimensional Salerno model lattice
VL  - 103
IS  - 3
SP  - 032211
DO  - 10.1103/PhysRevE.103.032211
ER  - 
@article{
author = "Mithun, Thudiyangal and Maluckov, Aleksandra and Manda, Bertin Many and Skokos, Charalampos and Bishop, Alan and Saxena, Avadh and Khare, Avinash and Kevrekidis, Panayotis G",
year = "2021",
abstract = "The Salerno model constitutes an intriguing interpolation between the integrable Ablowitz-Ladik (AL) model and the more standard (nonintegrable) discrete nonlinear Schrödinger (DNLS) one. The competition of local on-site nonlinearity and nonlinear dispersion governs the thermalization of this model. Here, we investigate the statistical mechanics of the Salerno one-dimensional lattice model in the nonintegrable case and illustrate the thermalization in the Gibbs regime. As the parameter interpolating between the two limits (from DNLS toward AL) is varied, the region in the space of initial energy and norm densities leading to thermalization expands. The thermalization in the non-Gibbs regime heavily depends on the finite system size; we explore this feature via direct numerical computations for different parametric regimes. © 2021 American Physical Society.",
journal = "Physical Review E",
title = "Thermalization in the one-dimensional Salerno model lattice",
volume = "103",
number = "3",
pages = "032211",
doi = "10.1103/PhysRevE.103.032211"
}
Mithun, T., Maluckov, A., Manda, B. M., Skokos, C., Bishop, A., Saxena, A., Khare, A.,& Kevrekidis, P. G.. (2021). Thermalization in the one-dimensional Salerno model lattice. in Physical Review E, 103(3), 032211.
https://doi.org/10.1103/PhysRevE.103.032211
Mithun T, Maluckov A, Manda BM, Skokos C, Bishop A, Saxena A, Khare A, Kevrekidis PG. Thermalization in the one-dimensional Salerno model lattice. in Physical Review E. 2021;103(3):032211.
doi:10.1103/PhysRevE.103.032211 .
Mithun, Thudiyangal, Maluckov, Aleksandra, Manda, Bertin Many, Skokos, Charalampos, Bishop, Alan, Saxena, Avadh, Khare, Avinash, Kevrekidis, Panayotis G, "Thermalization in the one-dimensional Salerno model lattice" in Physical Review E, 103, no. 3 (2021):032211,
https://doi.org/10.1103/PhysRevE.103.032211 . .
 1 1 1 1

Thermalization in the one-dimensional Salerno model lattice

(2021)

TY  - JOUR
AU  - Mithun, Thudiyangal
AU  - Maluckov, Aleksandra
AU  - Manda, Bertin Many
AU  - Skokos, Charalampos
AU  - Bishop, Alan
AU  - Khare, Avinash
AU  - Kevrekidis, Panayotis G
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9660
AB  - The Salerno model constitutes an intriguing interpolation between the integrable Ablowitz-Ladik (AL) model and the more standard (nonintegrable) discrete nonlinear Schrödinger (DNLS) one. The competition of local on-site nonlinearity and nonlinear dispersion governs the thermalization of this model. Here, we investigate the statistical mechanics of the Salerno one-dimensional lattice model in the nonintegrable case and illustrate the thermalization in the Gibbs regime. As the parameter interpolating between the two limits (from DNLS toward AL) is varied, the region in the space of initial energy and norm densities leading to thermalization expands. The thermalization in the non-Gibbs regime heavily depends on the finite system size; we explore this feature via direct numerical computations for different parametric regimes.
T2  - Physical Review E
T1  - Thermalization in the one-dimensional Salerno model lattice
VL  - 103
IS  - 3
SP  - 032211
DO  - 10.1103/PhysRevE.103.032211
ER  - 
@article{
author = "Mithun, Thudiyangal and Maluckov, Aleksandra and Manda, Bertin Many and Skokos, Charalampos and Bishop, Alan and Saxena, Avadh and Khare, Avinash and Kevrekidis, Panayotis G",
year = "2021",
abstract = "The Salerno model constitutes an intriguing interpolation between the integrable Ablowitz-Ladik (AL) model and the more standard (nonintegrable) discrete nonlinear Schrödinger (DNLS) one. The competition of local on-site nonlinearity and nonlinear dispersion governs the thermalization of this model. Here, we investigate the statistical mechanics of the Salerno one-dimensional lattice model in the nonintegrable case and illustrate the thermalization in the Gibbs regime. As the parameter interpolating between the two limits (from DNLS toward AL) is varied, the region in the space of initial energy and norm densities leading to thermalization expands. The thermalization in the non-Gibbs regime heavily depends on the finite system size; we explore this feature via direct numerical computations for different parametric regimes.",
journal = "Physical Review E",
title = "Thermalization in the one-dimensional Salerno model lattice",
volume = "103",
number = "3",
pages = "032211",
doi = "10.1103/PhysRevE.103.032211"
}
Mithun, T., Maluckov, A., Manda, B. M., Skokos, C., Bishop, A., Saxena, A., Khare, A.,& Kevrekidis, P. G.. (2021). Thermalization in the one-dimensional Salerno model lattice. in Physical Review E, 103(3), 032211.
https://doi.org/10.1103/PhysRevE.103.032211
Mithun T, Maluckov A, Manda BM, Skokos C, Bishop A, Saxena A, Khare A, Kevrekidis PG. Thermalization in the one-dimensional Salerno model lattice. in Physical Review E. 2021;103(3):032211.
doi:10.1103/PhysRevE.103.032211 .
Mithun, Thudiyangal, Maluckov, Aleksandra, Manda, Bertin Many, Skokos, Charalampos, Bishop, Alan, Saxena, Avadh, Khare, Avinash, Kevrekidis, Panayotis G, "Thermalization in the one-dimensional Salerno model lattice" in Physical Review E, 103, no. 3 (2021):032211,
https://doi.org/10.1103/PhysRevE.103.032211 . .
 1 1 1 1

Probing Band Topology Using Modulational Instability

(2021)

TY  - JOUR
AU  - Leykam, Daniel
AU  - Smolina, Ekaterina
AU  - Maluckov, Aleksandra
AU  - Flach, Sergej
AU  - Smirnova, Daria A
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9153
AB  - We analyze the modulational instability of nonlinear Bloch waves in topological photonic lattices. In the initial phase of the instability development captured by the linear stability analysis, long wavelength instabilities and bifurcations of the nonlinear Bloch waves are sensitive to topological band inversions. At longer timescales, nonlinear wave mixing induces spreading of energy through the entire band and spontaneous creation of wave polarization singularities determined by the band Chern number. Our analytical and numerical results establish modulational instability as a tool to probe bulk topological invariants and create topologically nontrivial wave fields. © 2021 American Physical Society.
T2  - Physical Review Letters
T1  - Probing Band Topology Using Modulational Instability
VL  - 126
IS  - 7
SP  - 073901
DO  - 10.1103/PhysRevLett.126.073901
ER  - 
@article{
author = "Leykam, Daniel and Smolina, Ekaterina and Maluckov, Aleksandra and Flach, Sergej and Smirnova, Daria A",
year = "2021",
abstract = "We analyze the modulational instability of nonlinear Bloch waves in topological photonic lattices. In the initial phase of the instability development captured by the linear stability analysis, long wavelength instabilities and bifurcations of the nonlinear Bloch waves are sensitive to topological band inversions. At longer timescales, nonlinear wave mixing induces spreading of energy through the entire band and spontaneous creation of wave polarization singularities determined by the band Chern number. Our analytical and numerical results establish modulational instability as a tool to probe bulk topological invariants and create topologically nontrivial wave fields. © 2021 American Physical Society.",
journal = "Physical Review Letters",
title = "Probing Band Topology Using Modulational Instability",
volume = "126",
number = "7",
pages = "073901",
doi = "10.1103/PhysRevLett.126.073901"
}
Leykam, D., Smolina, E., Maluckov, A., Flach, S.,& Smirnova, D. A.. (2021). Probing Band Topology Using Modulational Instability. in Physical Review Letters, 126(7), 073901.
https://doi.org/10.1103/PhysRevLett.126.073901
Leykam D, Smolina E, Maluckov A, Flach S, Smirnova DA. Probing Band Topology Using Modulational Instability. in Physical Review Letters. 2021;126(7):073901.
doi:10.1103/PhysRevLett.126.073901 .
Leykam, Daniel, Smolina, Ekaterina, Maluckov, Aleksandra, Flach, Sergej, Smirnova, Daria A, "Probing Band Topology Using Modulational Instability" in Physical Review Letters, 126, no. 7 (2021):073901,
https://doi.org/10.1103/PhysRevLett.126.073901 . .
 50 9 3 7

Nonlinear Bloch wave dynamics in photonic Aharonov–Bohm cages

(2021)

TY  - JOUR
AU  - Chang, Nana
AU  - Gundogdu, Sinan
AU  - Leykam, Daniel
AU  - Angelakis, Dimitris G.
AU  - Kou, SuPeng
AU  - Flach, Sergej
AU  - Maluckov, Aleksandra
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9141
AB  - We study the properties of nonlinear Bloch waves in a diamond chain waveguide lattice in the presence of a synthetic magnetic flux. In the linear limit, the lattice exhibits a completely flat (wavevector k-independent) band structure, resulting in perfect wave localization, known as Aharonov-Bohm caging. We find that in the presence of nonlinearity, the Bloch waves become sensitive to k, exhibiting bifurcations and instabilities. Performing numerical beam propagation simulations using the tight-binding model, we show how the instabilities can result in either the spontaneous or controlled formation of localized modes, which are immobile and remain pinned in place due to the synthetic magnetic flux. © 2021 Author(s.
T2  - APL Photonics
T1  - Nonlinear Bloch wave dynamics in photonic Aharonov–Bohm cages
VL  - 6
IS  - 3
SP  - 030801
DO  - 10.1063/5.0037767
ER  - 
@article{
author = "Chang, Nana and Gundogdu, Sinan and Leykam, Daniel and Angelakis, Dimitris G. and Kou, SuPeng and Flach, Sergej and Maluckov, Aleksandra",
year = "2021",
abstract = "We study the properties of nonlinear Bloch waves in a diamond chain waveguide lattice in the presence of a synthetic magnetic flux. In the linear limit, the lattice exhibits a completely flat (wavevector k-independent) band structure, resulting in perfect wave localization, known as Aharonov-Bohm caging. We find that in the presence of nonlinearity, the Bloch waves become sensitive to k, exhibiting bifurcations and instabilities. Performing numerical beam propagation simulations using the tight-binding model, we show how the instabilities can result in either the spontaneous or controlled formation of localized modes, which are immobile and remain pinned in place due to the synthetic magnetic flux. © 2021 Author(s.",
journal = "APL Photonics",
title = "Nonlinear Bloch wave dynamics in photonic Aharonov–Bohm cages",
volume = "6",
number = "3",
pages = "030801",
doi = "10.1063/5.0037767"
}
Chang, N., Gundogdu, S., Leykam, D., Angelakis, D. G., Kou, S., Flach, S.,& Maluckov, A.. (2021). Nonlinear Bloch wave dynamics in photonic Aharonov–Bohm cages. in APL Photonics, 6(3), 030801.
https://doi.org/10.1063/5.0037767
Chang N, Gundogdu S, Leykam D, Angelakis DG, Kou S, Flach S, Maluckov A. Nonlinear Bloch wave dynamics in photonic Aharonov–Bohm cages. in APL Photonics. 2021;6(3):030801.
doi:10.1063/5.0037767 .
Chang, Nana, Gundogdu, Sinan, Leykam, Daniel, Angelakis, Dimitris G., Kou, SuPeng, Flach, Sergej, Maluckov, Aleksandra, "Nonlinear Bloch wave dynamics in photonic Aharonov–Bohm cages" in APL Photonics, 6, no. 3 (2021):030801,
https://doi.org/10.1063/5.0037767 . .
 1 3 1 2

Localized modes in linear and nonlinear octagonal-diamond lattices with two flat bands

(2020)

TY  - JOUR
AU  - Stojanović, Mirjana G.
AU  - Stojanović Krasić, Marija
AU  - Maluckov, Aleksandra
AU  - Johansson, Magnus M.
AU  - Salinas, I. A.
AU  - Vicencio, Rodrigo A.
AU  - Stepić, Milutin
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9664
AB  - We consider a two-dimensional octagonal-diamond network with a fine-tuned diagonal coupling inside the diamond-shaped unit cell. Its linear spectrum exhibits coexistence of two dispersive bands (DBs) and two flat bands (FBs), touching one of the DBs embedded between them. Analogous to the kagome lattice, one of the FBs will constitute the ground state of the system for a proper sign choice of the Hamiltonian. The system is characterized by two different flat-band fundamental octagonal compactons, originating from the destructive interference of fully geometric nature. In the presence of a nonlinear amplitude (on-site) perturbation, the single-octagon linear modes continue into one-parameter families of nonlinear compact modes with the same amplitude and phase structure. However, numerical stability analysis indicates that all strictly compact nonlinear modes are unstable, either purely exponentially or with oscillatory instabilities, for weak and intermediate nonlinearities and sufficiently large system sizes. Stabilization may appear in certain ranges for finite systems and, for the compacton originating from the band at the spectral edge, also in a regime of very large focusing nonlinearities. In contrast to the kagome lattice, the latter compacton family will become unstable already for arbitrarily weak defocusing nonlinearity for large enough systems. We show analytically the existence of a critical system size consisting of 12 octagon rings, such that the ground state for weak defocusing nonlinearity is a stable single compacton for smaller systems, and a continuation of a nontrivial, noncompact linear combination of single compacton modes for larger systems. Investigating generally the different nonlinear localized (noncompact) mode families in the semi-infinite gap bounded by this FB, we find that, for increasing (defocusing) nonlinearity the stable ground state will continuously develop into an exponentially localized mode with two main peaks in antiphase. At a critical nonlinearity strength a symmetry-breaking pitchfork bifurcation appears, so that the stable ground state is single peaked for larger defocusing nonlinearities. We also investigate numerically the mobility of localized modes in this regime and find that the considered modes are generally immobile both with respect to axial and diagonal phase-gradient perturbations.
T2  - Physical Review A
T1  - Localized modes in linear and nonlinear octagonal-diamond lattices with two flat bands
VL  - 102
IS  - 2
SP  - 023532
DO  - 10.1103/PhysRevA.102.023532
ER  - 
@article{
author = "Stojanović, Mirjana G. and Stojanović Krasić, Marija and Maluckov, Aleksandra and Johansson, Magnus M. and Salinas, I. A. and Vicencio, Rodrigo A. and Stepić, Milutin",
year = "2020",
abstract = "We consider a two-dimensional octagonal-diamond network with a fine-tuned diagonal coupling inside the diamond-shaped unit cell. Its linear spectrum exhibits coexistence of two dispersive bands (DBs) and two flat bands (FBs), touching one of the DBs embedded between them. Analogous to the kagome lattice, one of the FBs will constitute the ground state of the system for a proper sign choice of the Hamiltonian. The system is characterized by two different flat-band fundamental octagonal compactons, originating from the destructive interference of fully geometric nature. In the presence of a nonlinear amplitude (on-site) perturbation, the single-octagon linear modes continue into one-parameter families of nonlinear compact modes with the same amplitude and phase structure. However, numerical stability analysis indicates that all strictly compact nonlinear modes are unstable, either purely exponentially or with oscillatory instabilities, for weak and intermediate nonlinearities and sufficiently large system sizes. Stabilization may appear in certain ranges for finite systems and, for the compacton originating from the band at the spectral edge, also in a regime of very large focusing nonlinearities. In contrast to the kagome lattice, the latter compacton family will become unstable already for arbitrarily weak defocusing nonlinearity for large enough systems. We show analytically the existence of a critical system size consisting of 12 octagon rings, such that the ground state for weak defocusing nonlinearity is a stable single compacton for smaller systems, and a continuation of a nontrivial, noncompact linear combination of single compacton modes for larger systems. Investigating generally the different nonlinear localized (noncompact) mode families in the semi-infinite gap bounded by this FB, we find that, for increasing (defocusing) nonlinearity the stable ground state will continuously develop into an exponentially localized mode with two main peaks in antiphase. At a critical nonlinearity strength a symmetry-breaking pitchfork bifurcation appears, so that the stable ground state is single peaked for larger defocusing nonlinearities. We also investigate numerically the mobility of localized modes in this regime and find that the considered modes are generally immobile both with respect to axial and diagonal phase-gradient perturbations.",
journal = "Physical Review A",
title = "Localized modes in linear and nonlinear octagonal-diamond lattices with two flat bands",
volume = "102",
number = "2",
pages = "023532",
doi = "10.1103/PhysRevA.102.023532"
}
Stojanović, M. G., Stojanović Krasić, M., Maluckov, A., Johansson, M. M., Salinas, I. A., Vicencio, R. A.,& Stepić, M.. (2020). Localized modes in linear and nonlinear octagonal-diamond lattices with two flat bands. in Physical Review A, 102(2), 023532.
https://doi.org/10.1103/PhysRevA.102.023532
Stojanović MG, Stojanović Krasić M, Maluckov A, Johansson MM, Salinas IA, Vicencio RA, Stepić M. Localized modes in linear and nonlinear octagonal-diamond lattices with two flat bands. in Physical Review A. 2020;102(2):023532.
doi:10.1103/PhysRevA.102.023532 .
Stojanović, Mirjana G., Stojanović Krasić, Marija, Maluckov, Aleksandra, Johansson, Magnus M., Salinas, I. A., Vicencio, Rodrigo A., Stepić, Milutin, "Localized modes in linear and nonlinear octagonal-diamond lattices with two flat bands" in Physical Review A, 102, no. 2 (2020):023532,
https://doi.org/10.1103/PhysRevA.102.023532 . .
 2 1 2

Localized modes in a two-dimensional lattice with a pluslike geometry

(2020)

TY  - JOUR
AU  - Stojanović Krasić, Marija
AU  - Stojanović, Mirjana G.
AU  - Maluckov, Aleksandra
AU  - Maczewsky, Lukas J.
AU  - Szameit, Alexander
AU  - Stepić, Milutin
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9684
AB  - We investigate analytically and numerically the existence and dynamical stability of different localized modes in a two-dimensional photonic lattice comprising a square plaquette inscribed in the dodecagon lattices. The eigenvalue spectrum of the underlying linear lattice is characterized by a net formed of one flat band and four dispersive bands. By tailoring the intersite coupling coefficient ratio, opening of gaps between two pairs of neighboring dispersive bands can be induced, while the fully degenerate flat band characterized by compact eigenmodes stays nested between two inner dispersive bands. The nonlinearity destabilizes the compact modes and gives rise to unique families of localized modes in the newly opened gaps, as well as in the semi-infinite gaps. The governing mechanism of mode localization in that case is the light energy self-trapping effect. We have shown the stability of a few families of nonlinear modes in gaps. The suggested lattice model may serve for probing various artificial flat-band systems such as ultracold atoms in optical lattices, periodic electronic networks, and polariton condensates.
T2  - Physical Review E
T1  - Localized modes in a two-dimensional lattice with a pluslike geometry
VL  - 102
IS  - 3
SP  - 032207
DO  - 10.1103/PhysRevE.102.032207
ER  - 
@article{
author = "Stojanović Krasić, Marija and Stojanović, Mirjana G. and Maluckov, Aleksandra and Maczewsky, Lukas J. and Szameit, Alexander and Stepić, Milutin",
year = "2020",
abstract = "We investigate analytically and numerically the existence and dynamical stability of different localized modes in a two-dimensional photonic lattice comprising a square plaquette inscribed in the dodecagon lattices. The eigenvalue spectrum of the underlying linear lattice is characterized by a net formed of one flat band and four dispersive bands. By tailoring the intersite coupling coefficient ratio, opening of gaps between two pairs of neighboring dispersive bands can be induced, while the fully degenerate flat band characterized by compact eigenmodes stays nested between two inner dispersive bands. The nonlinearity destabilizes the compact modes and gives rise to unique families of localized modes in the newly opened gaps, as well as in the semi-infinite gaps. The governing mechanism of mode localization in that case is the light energy self-trapping effect. We have shown the stability of a few families of nonlinear modes in gaps. The suggested lattice model may serve for probing various artificial flat-band systems such as ultracold atoms in optical lattices, periodic electronic networks, and polariton condensates.",
journal = "Physical Review E",
title = "Localized modes in a two-dimensional lattice with a pluslike geometry",
volume = "102",
number = "3",
pages = "032207",
doi = "10.1103/PhysRevE.102.032207"
}
Stojanović Krasić, M., Stojanović, M. G., Maluckov, A., Maczewsky, L. J., Szameit, A.,& Stepić, M.. (2020). Localized modes in a two-dimensional lattice with a pluslike geometry. in Physical Review E, 102(3), 032207.
https://doi.org/10.1103/PhysRevE.102.032207
Stojanović Krasić M, Stojanović MG, Maluckov A, Maczewsky LJ, Szameit A, Stepić M. Localized modes in a two-dimensional lattice with a pluslike geometry. in Physical Review E. 2020;102(3):032207.
doi:10.1103/PhysRevE.102.032207 .
Stojanović Krasić, Marija, Stojanović, Mirjana G., Maluckov, Aleksandra, Maczewsky, Lukas J., Szameit, Alexander, Stepić, Milutin, "Localized modes in a two-dimensional lattice with a pluslike geometry" in Physical Review E, 102, no. 3 (2020):032207,
https://doi.org/10.1103/PhysRevE.102.032207 . .
 1 1 1 1

Modulational Instability, Inter-Component Asymmetry, and Formation of Quantum Droplets in One-Dimensional Binary Bose Gases

(2020)

TY  - JOUR
AU  - Mithun, Thudiyangal
AU  - Maluckov, Aleksandra
AU  - Kasamatsu, Kenichi
AU  - Malomed, Boris A
AU  - Khare, Avinash
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8977
AB  - Quantum droplets are ultradilute liquid states that emerge from the competitive interplay of two Hamiltonian terms, the mean-field energy and beyond-mean-field correction, in a weakly interacting binary Bose gas. We relate the formation of droplets in symmetric and asymmetric two-component one-dimensional boson systems to the modulational instability of a spatially uniform state driven by the beyond-mean-field term. Asymmetry between the components may be caused by their unequal populations or unequal intra-component interaction strengths. Stability of both symmetric and asymmetric droplets is investigated. Robustness of the symmetric solutions against symmetry-breaking perturbations is confirmed.
T2  - Symmetry
T1  - Modulational Instability, Inter-Component Asymmetry, and Formation of Quantum Droplets in One-Dimensional Binary Bose Gases
VL  - 12
IS  - 1
SP  - 174
DO  - 10.3390/sym12010174
ER  - 
@article{
author = "Mithun, Thudiyangal and Maluckov, Aleksandra and Kasamatsu, Kenichi and Malomed, Boris A and Khare, Avinash",
year = "2020",
abstract = "Quantum droplets are ultradilute liquid states that emerge from the competitive interplay of two Hamiltonian terms, the mean-field energy and beyond-mean-field correction, in a weakly interacting binary Bose gas. We relate the formation of droplets in symmetric and asymmetric two-component one-dimensional boson systems to the modulational instability of a spatially uniform state driven by the beyond-mean-field term. Asymmetry between the components may be caused by their unequal populations or unequal intra-component interaction strengths. Stability of both symmetric and asymmetric droplets is investigated. Robustness of the symmetric solutions against symmetry-breaking perturbations is confirmed.",
journal = "Symmetry",
title = "Modulational Instability, Inter-Component Asymmetry, and Formation of Quantum Droplets in One-Dimensional Binary Bose Gases",
volume = "12",
number = "1",
pages = "174",
doi = "10.3390/sym12010174"
}
Mithun, T., Maluckov, A., Kasamatsu, K., Malomed, B. A.,& Khare, A.. (2020). Modulational Instability, Inter-Component Asymmetry, and Formation of Quantum Droplets in One-Dimensional Binary Bose Gases. in Symmetry, 12(1), 174.
https://doi.org/10.3390/sym12010174
Mithun T, Maluckov A, Kasamatsu K, Malomed BA, Khare A. Modulational Instability, Inter-Component Asymmetry, and Formation of Quantum Droplets in One-Dimensional Binary Bose Gases. in Symmetry. 2020;12(1):174.
doi:10.3390/sym12010174 .
Mithun, Thudiyangal, Maluckov, Aleksandra, Kasamatsu, Kenichi, Malomed, Boris A, Khare, Avinash, "Modulational Instability, Inter-Component Asymmetry, and Formation of Quantum Droplets in One-Dimensional Binary Bose Gases" in Symmetry, 12, no. 1 (2020):174,
https://doi.org/10.3390/sym12010174 . .
 1 32 17 28

Deep learning-based classification of high intensity light patterns in photorefractive crystals

(2020)

TY  - JOUR
AU  - Ivanović, Marija D.
AU  - Mančić, Ana
AU  - Hermann-Avigliano, Carla
AU  - Maluckov, Aleksandra
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8837
AB  - In this paper, we establish a new scheme for identification and classification of high intensity events generated by the propagation of light through a photorefractive SBN crystal. Among these events, which are the inevitable consequence of the development of modulation instability, are speckling and soliton-like patterns. The usual classifiers, developed on statistical measures, such as the significant intensity, often provide only a partial characterization of these events. Here, we try to overcome this deficiency by implementing the convolution neural network method to relate experimental data of light intensity distribution and corresponding numerical outputs with different high intensity regimes. The train and test sets are formed of experimentally obtained intensity profiles at the crystal output facet and corresponding numerical profiles. The accuracy of detection of speckles reaches maximum value of 100%, while the accuracy of solitons and caustic detection is above 97%. These performances are promising for the creation of neural network based routines for prediction of extreme events in wave media. © 2020 IOP Publishing Ltd.
T2  - Journal of Optics
T1  - Deep learning-based classification of high intensity light patterns in photorefractive crystals
VL  - 22
IS  - 3
SP  - 035504
DO  - 10.1088/2040-8986/ab70f0
ER  - 
@article{
author = "Ivanović, Marija D. and Mančić, Ana and Hermann-Avigliano, Carla and Hadžievski, Ljupčo and Maluckov, Aleksandra",
year = "2020",
abstract = "In this paper, we establish a new scheme for identification and classification of high intensity events generated by the propagation of light through a photorefractive SBN crystal. Among these events, which are the inevitable consequence of the development of modulation instability, are speckling and soliton-like patterns. The usual classifiers, developed on statistical measures, such as the significant intensity, often provide only a partial characterization of these events. Here, we try to overcome this deficiency by implementing the convolution neural network method to relate experimental data of light intensity distribution and corresponding numerical outputs with different high intensity regimes. The train and test sets are formed of experimentally obtained intensity profiles at the crystal output facet and corresponding numerical profiles. The accuracy of detection of speckles reaches maximum value of 100%, while the accuracy of solitons and caustic detection is above 97%. These performances are promising for the creation of neural network based routines for prediction of extreme events in wave media. © 2020 IOP Publishing Ltd.",
journal = "Journal of Optics",
title = "Deep learning-based classification of high intensity light patterns in photorefractive crystals",
volume = "22",
number = "3",
pages = "035504",
doi = "10.1088/2040-8986/ab70f0"
}
Ivanović, M. D., Mančić, A., Hermann-Avigliano, C., Hadžievski, L.,& Maluckov, A.. (2020). Deep learning-based classification of high intensity light patterns in photorefractive crystals. in Journal of Optics, 22(3), 035504.
https://doi.org/10.1088/2040-8986/ab70f0
Ivanović MD, Mančić A, Hermann-Avigliano C, Hadžievski L, Maluckov A. Deep learning-based classification of high intensity light patterns in photorefractive crystals. in Journal of Optics. 2020;22(3):035504.
doi:10.1088/2040-8986/ab70f0 .
Ivanović, Marija D., Mančić, Ana, Hermann-Avigliano, Carla, Hadžievski, Ljupčo, Maluckov, Aleksandra, "Deep learning-based classification of high intensity light patterns in photorefractive crystals" in Journal of Optics, 22, no. 3 (2020):035504,
https://doi.org/10.1088/2040-8986/ab70f0 . .
 2

Influence of different disorder types on Aharonov-Bohm caging in the diamond chain

(2020)

TY  - JOUR
AU  - Gligorić, Goran
AU  - Leykam, Daniel
AU  - Maluckov, Aleksandra
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8914
AB  - The linear diamond chain with fine-tuned effective magnetic flux has a completely flat energy spectrum and compactly localized eigenmodes, forming an Aharonov-Bohm cage. We study numerically how this localization is affected by different types of disorder (static and time-evolving) relevant to recent realizations of Aharonov-Bohm cages in periodically modulated optical waveguide arrays. We demonstrate robustness of localization under static and time-periodic disorder. In contrast, nonquenched (time-dependent) disorder leads to wave-packet spreading and delocalization.
T2  - Physical Review A
T1  - Influence of different disorder types on Aharonov-Bohm caging in the diamond chain
VL  - 101
IS  - 2
SP  - 023839
DO  - 10.1103/PhysRevA.101.023839
ER  - 
@article{
author = "Gligorić, Goran and Leykam, Daniel and Maluckov, Aleksandra",
year = "2020",
abstract = "The linear diamond chain with fine-tuned effective magnetic flux has a completely flat energy spectrum and compactly localized eigenmodes, forming an Aharonov-Bohm cage. We study numerically how this localization is affected by different types of disorder (static and time-evolving) relevant to recent realizations of Aharonov-Bohm cages in periodically modulated optical waveguide arrays. We demonstrate robustness of localization under static and time-periodic disorder. In contrast, nonquenched (time-dependent) disorder leads to wave-packet spreading and delocalization.",
journal = "Physical Review A",
title = "Influence of different disorder types on Aharonov-Bohm caging in the diamond chain",
volume = "101",
number = "2",
pages = "023839",
doi = "10.1103/PhysRevA.101.023839"
}
Gligorić, G., Leykam, D.,& Maluckov, A.. (2020). Influence of different disorder types on Aharonov-Bohm caging in the diamond chain. in Physical Review A, 101(2), 023839.
https://doi.org/10.1103/PhysRevA.101.023839
Gligorić G, Leykam D, Maluckov A. Influence of different disorder types on Aharonov-Bohm caging in the diamond chain. in Physical Review A. 2020;101(2):023839.
doi:10.1103/PhysRevA.101.023839 .
Gligorić, Goran, Leykam, Daniel, Maluckov, Aleksandra, "Influence of different disorder types on Aharonov-Bohm caging in the diamond chain" in Physical Review A, 101, no. 2 (2020):023839,
https://doi.org/10.1103/PhysRevA.101.023839 . .
 1 5 3 2

Stationary solitary and kink solutions in the helicoidal Peyrard-Bishop model of DNA molecule

(2019)

TY  - JOUR
AU  - Zdravković, Slobodan
AU  - Čevizović, Dalibor
AU  - Bugay, Aleksandr N.
AU  - Maluckov, Aleksandra
PY  - 2019
UR  - http://aip.scitation.org/doi/10.1063/1.5090962
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8207
AB  - We study nonlinear dynamics of the DNA molecule relying on a helicoidal Peyrard-Bishop model. We look for traveling wave solutions and show that a continuum approximation brings about kink solitons moving along the chain. This statement is supported by the numerical solution of a relevant dynamical equation of motion. Finally, we argue that an existence of both kinks and localized modulated solitons (breathers) could be a useful tool to describe DNA-RNA transcription. © 2019 Author(s).
T2  - Chaos: An Interdisciplinary Journal of Nonlinear Science
T1  - Stationary solitary and kink solutions in the helicoidal Peyrard-Bishop model of DNA molecule
VL  - 29
IS  - 5
SP  - 053118
DO  - 10.1063/1.5090962
ER  - 
@article{
author = "Zdravković, Slobodan and Čevizović, Dalibor and Bugay, Aleksandr N. and Maluckov, Aleksandra",
year = "2019",
abstract = "We study nonlinear dynamics of the DNA molecule relying on a helicoidal Peyrard-Bishop model. We look for traveling wave solutions and show that a continuum approximation brings about kink solitons moving along the chain. This statement is supported by the numerical solution of a relevant dynamical equation of motion. Finally, we argue that an existence of both kinks and localized modulated solitons (breathers) could be a useful tool to describe DNA-RNA transcription. © 2019 Author(s).",
journal = "Chaos: An Interdisciplinary Journal of Nonlinear Science",
title = "Stationary solitary and kink solutions in the helicoidal Peyrard-Bishop model of DNA molecule",
volume = "29",
number = "5",
pages = "053118",
doi = "10.1063/1.5090962"
}
Zdravković, S., Čevizović, D., Bugay, A. N.,& Maluckov, A.. (2019). Stationary solitary and kink solutions in the helicoidal Peyrard-Bishop model of DNA molecule. in Chaos: An Interdisciplinary Journal of Nonlinear Science, 29(5), 053118.
https://doi.org/10.1063/1.5090962
Zdravković S, Čevizović D, Bugay AN, Maluckov A. Stationary solitary and kink solutions in the helicoidal Peyrard-Bishop model of DNA molecule. in Chaos: An Interdisciplinary Journal of Nonlinear Science. 2019;29(5):053118.
doi:10.1063/1.5090962 .
Zdravković, Slobodan, Čevizović, Dalibor, Bugay, Aleksandr N., Maluckov, Aleksandra, "Stationary solitary and kink solutions in the helicoidal Peyrard-Bishop model of DNA molecule" in Chaos: An Interdisciplinary Journal of Nonlinear Science, 29, no. 5 (2019):053118,
https://doi.org/10.1063/1.5090962 . .
 5 5 5

Deep Learning Approach for Highly Specific Atrial Fibrillation and Flutter Detection based on RR Intervals

(IEEE, 2019)

TY  - CONF
AU  - Ivanović, Marija D.
AU  - Shvilkin, Alexei
AU  - Maluckov, Aleksandra
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8805
AB  - Atrial fibrillation (AF) and atrial flutter (AFL) represent atrial arrhythmias closely related to increasing risk for embolic stroke, and therefore being in the focus of cardiologists. While the reported methods for AF detection exhibit high performances, little attention has been given to distinguishing these two arrhythmias. In this study, we propose a deep neural network architecture, which combines convolutional and recurrent neural networks, for extracting features from sequence of RR intervals. The learned features were used to classify a long term ECG signals as AF, AFL or sinus rhythm (SR). A 10-fold cross-validation strategy was used for choosing an architecture design and tuning model hyperparameters. Accuracy of 88.28 %, with the sensitivities of 93.83%, 83.60% and 83.83% for SR, AF and AFL, respectively, was achieved. After choosing optimal network structure, the model was trained on the entire training set and finally evaluated on the blindfold test set which resulted in 89.67% accuracy, and 97.20%, 94.20%, and 77.78% sensitivity for SR, AF and AFL, respectively. Promising performances of the proposed model encourage continuing development of highly specific AF and AFL detection procedure based on deep learning. Distinction between these two arrhythmias can make therapy more efficient and decrease the recovery time to normal heart rhythm. © 2019 IEEE.
PB  - IEEE
C3  - Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) (41; 2019; Berlin)
T1  - Deep Learning Approach for Highly Specific Atrial Fibrillation and Flutter Detection based on RR Intervals
SP  - 1780
EP  - 1783
DO  - 10.1109/EMBC.2019.8856806
ER  - 
@conference{
author = "Ivanović, Marija D. and Atanasoski, Vladimir and Shvilkin, Alexei and Hadžievski, Ljupčo and Maluckov, Aleksandra",
year = "2019",
abstract = "Atrial fibrillation (AF) and atrial flutter (AFL) represent atrial arrhythmias closely related to increasing risk for embolic stroke, and therefore being in the focus of cardiologists. While the reported methods for AF detection exhibit high performances, little attention has been given to distinguishing these two arrhythmias. In this study, we propose a deep neural network architecture, which combines convolutional and recurrent neural networks, for extracting features from sequence of RR intervals. The learned features were used to classify a long term ECG signals as AF, AFL or sinus rhythm (SR). A 10-fold cross-validation strategy was used for choosing an architecture design and tuning model hyperparameters. Accuracy of 88.28 %, with the sensitivities of 93.83%, 83.60% and 83.83% for SR, AF and AFL, respectively, was achieved. After choosing optimal network structure, the model was trained on the entire training set and finally evaluated on the blindfold test set which resulted in 89.67% accuracy, and 97.20%, 94.20%, and 77.78% sensitivity for SR, AF and AFL, respectively. Promising performances of the proposed model encourage continuing development of highly specific AF and AFL detection procedure based on deep learning. Distinction between these two arrhythmias can make therapy more efficient and decrease the recovery time to normal heart rhythm. © 2019 IEEE.",
publisher = "IEEE",
journal = "Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) (41; 2019; Berlin)",
title = "Deep Learning Approach for Highly Specific Atrial Fibrillation and Flutter Detection based on RR Intervals",
pages = "1780-1783",
doi = "10.1109/EMBC.2019.8856806"
}
Ivanović, M. D., Atanasoski, V., Shvilkin, A., Hadžievski, L.,& Maluckov, A.. (2019). Deep Learning Approach for Highly Specific Atrial Fibrillation and Flutter Detection based on RR Intervals. in Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) (41; 2019; Berlin)
IEEE., 1780-1783.
https://doi.org/10.1109/EMBC.2019.8856806
Ivanović MD, Atanasoski V, Shvilkin A, Hadžievski L, Maluckov A. Deep Learning Approach for Highly Specific Atrial Fibrillation and Flutter Detection based on RR Intervals. in Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) (41; 2019; Berlin). 2019;:1780-1783.
doi:10.1109/EMBC.2019.8856806 .
Ivanović, Marija D., Atanasoski, Vladimir, Shvilkin, Alexei, Hadžievski, Ljupčo, Maluckov, Aleksandra, "Deep Learning Approach for Highly Specific Atrial Fibrillation and Flutter Detection based on RR Intervals" in Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) (41; 2019; Berlin) (2019):1780-1783,
https://doi.org/10.1109/EMBC.2019.8856806 . .
 20 18

Nonlinear symmetry breaking of Aharonov-Bohm cages

(2019)

TY  - JOUR
AU  - Gligorić, Goran
AU  - Beličev, Petra
AU  - Leykam, Daniel
AU  - Maluckov, Aleksandra
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8035
AB  - We study the influence of mean-field cubic nonlinearity on Aharonov-Bohm caging in a diamond lattice with synthetic magnetic flux. For sufficiently weak nonlinearities, the Aharonov-Bohm caging persists as periodic nonlinear breathing dynamics. Above a critical nonlinearity, symmetry breaking induces a sharp transition in the dynamics and enables stronger wave-packet spreading. This transition is distinct from other flatband networks, where continuous spreading is induced by effective nonlinear hopping or resonances with delocalized modes and is in contrast to the quantum limit, where two-particle hopping enables arbitrarily large spreading. This nonlinear symmetry-breaking transition is readily observable in femtosecond laser-written waveguide arrays. © 2019 American Physical Society.
T2  - Physical Review A
T1  - Nonlinear symmetry breaking of Aharonov-Bohm cages
VL  - 99
IS  - 1
SP  - 013826
DO  - 10.1103/PhysRevA.99.013826
ER  - 
@article{
author = "Gligorić, Goran and Beličev, Petra and Leykam, Daniel and Maluckov, Aleksandra",
year = "2019",
abstract = "We study the influence of mean-field cubic nonlinearity on Aharonov-Bohm caging in a diamond lattice with synthetic magnetic flux. For sufficiently weak nonlinearities, the Aharonov-Bohm caging persists as periodic nonlinear breathing dynamics. Above a critical nonlinearity, symmetry breaking induces a sharp transition in the dynamics and enables stronger wave-packet spreading. This transition is distinct from other flatband networks, where continuous spreading is induced by effective nonlinear hopping or resonances with delocalized modes and is in contrast to the quantum limit, where two-particle hopping enables arbitrarily large spreading. This nonlinear symmetry-breaking transition is readily observable in femtosecond laser-written waveguide arrays. © 2019 American Physical Society.",
journal = "Physical Review A",
title = "Nonlinear symmetry breaking of Aharonov-Bohm cages",
volume = "99",
number = "1",
pages = "013826",
doi = "10.1103/PhysRevA.99.013826"
}
Gligorić, G., Beličev, P., Leykam, D.,& Maluckov, A.. (2019). Nonlinear symmetry breaking of Aharonov-Bohm cages. in Physical Review A, 99(1), 013826.
https://doi.org/10.1103/PhysRevA.99.013826
Gligorić G, Beličev P, Leykam D, Maluckov A. Nonlinear symmetry breaking of Aharonov-Bohm cages. in Physical Review A. 2019;99(1):013826.
doi:10.1103/PhysRevA.99.013826 .
Gligorić, Goran, Beličev, Petra, Leykam, Daniel, Maluckov, Aleksandra, "Nonlinear symmetry breaking of Aharonov-Bohm cages" in Physical Review A, 99, no. 1 (2019):013826,
https://doi.org/10.1103/PhysRevA.99.013826 . .
 1 18 16 17

Nonlinear symmetry breaking of Aharonov-Bohm cages

(2019)

TY  - JOUR
AU  - Gligorić, Goran
AU  - Beličev, Petra
AU  - Leykam, Daniel
AU  - Maluckov, Aleksandra
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8035
UR  - https://arxiv.org/pdf/1810.01618.pdf
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8039
AB  - We study the influence of mean-field cubic nonlinearity on Aharonov-Bohm caging in a diamond lattice with synthetic magnetic flux. For sufficiently weak nonlinearities, the Aharonov-Bohm caging persists as periodic nonlinear breathing dynamics. Above a critical nonlinearity, symmetry breaking induces a sharp transition in the dynamics and enables stronger wave-packet spreading. This transition is distinct from other flatband networks, where continuous spreading is induced by effective nonlinear hopping or resonances with delocalized modes and is in contrast to the quantum limit, where two-particle hopping enables arbitrarily large spreading. This nonlinear symmetry-breaking transition is readily observable in femtosecond laser-written waveguide arrays. © 2019 American Physical Society.
T2  - Physical Review A
T1  - Nonlinear symmetry breaking of Aharonov-Bohm cages
VL  - 99
IS  - 1
SP  - 013826
DO  - 10.1103/PhysRevA.99.013826
ER  - 
@article{
author = "Gligorić, Goran and Beličev, Petra and Leykam, Daniel and Maluckov, Aleksandra",
year = "2019",
abstract = "We study the influence of mean-field cubic nonlinearity on Aharonov-Bohm caging in a diamond lattice with synthetic magnetic flux. For sufficiently weak nonlinearities, the Aharonov-Bohm caging persists as periodic nonlinear breathing dynamics. Above a critical nonlinearity, symmetry breaking induces a sharp transition in the dynamics and enables stronger wave-packet spreading. This transition is distinct from other flatband networks, where continuous spreading is induced by effective nonlinear hopping or resonances with delocalized modes and is in contrast to the quantum limit, where two-particle hopping enables arbitrarily large spreading. This nonlinear symmetry-breaking transition is readily observable in femtosecond laser-written waveguide arrays. © 2019 American Physical Society.",
journal = "Physical Review A",
title = "Nonlinear symmetry breaking of Aharonov-Bohm cages",
volume = "99",
number = "1",
pages = "013826",
doi = "10.1103/PhysRevA.99.013826"
}
Gligorić, G., Beličev, P., Leykam, D.,& Maluckov, A.. (2019). Nonlinear symmetry breaking of Aharonov-Bohm cages. in Physical Review A, 99(1), 013826.
https://doi.org/10.1103/PhysRevA.99.013826
Gligorić G, Beličev P, Leykam D, Maluckov A. Nonlinear symmetry breaking of Aharonov-Bohm cages. in Physical Review A. 2019;99(1):013826.
doi:10.1103/PhysRevA.99.013826 .
Gligorić, Goran, Beličev, Petra, Leykam, Daniel, Maluckov, Aleksandra, "Nonlinear symmetry breaking of Aharonov-Bohm cages" in Physical Review A, 99, no. 1 (2019):013826,
https://doi.org/10.1103/PhysRevA.99.013826 . .
 1 18 16 17

Spatial solitary like weak probe wave in the three-level Λ-type atoms

(2019)

TY  - CONF
AU  - Stevanović, Ljiljana
AU  - Maluckov, Aleksandra
AU  - Filipović, Nikola
PY  - 2019
UR  - http://aip.scitation.org/doi/abs/10.1063/1.5091159
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8094
AB  - We study the interaction of the medium composed of three-level atoms in A configuration interacting with two laser fields: weak probe field and strong control field. The probe field enters the medium under a certain angle, and it is initially in the form of the spatial soliton, while the control field is periodically modulated. The system of optical Bloch equations is analytically solved in the stationary regime by the perturbation method in order to obtain linear and third-order nonlinear susceptibility of the medium with respect to the probe field. After a straightforward algebraic procedure, using the approximation of the slow-varying field envelope, the nonlinear Schrödinger equation for the probe field is obtained. It is numerically solved by applying the spectral Fourier split-step method. It is found that, for properly chosen values of the probe and control field detunings and control Rabi frequency, the probe field behaves as a solitary wave whose direction does not depend on the incident angle. Moreover, the regime consisting of Bloch-like oscillations can be identified. The simulation is performed by choosing the corresponding levels of Mg atoms. © 2019 Author(s).
C3  - AIP Conference Proceedings
T1  - Spatial solitary like weak probe wave in the three-level Λ-type atoms
VL  - 2075
SP  - 030015
DO  - 10.1063/1.5091159
ER  - 
@conference{
author = "Stevanović, Ljiljana and Maluckov, Aleksandra and Filipović, Nikola and Pavlović, Vladan",
year = "2019",
abstract = "We study the interaction of the medium composed of three-level atoms in A configuration interacting with two laser fields: weak probe field and strong control field. The probe field enters the medium under a certain angle, and it is initially in the form of the spatial soliton, while the control field is periodically modulated. The system of optical Bloch equations is analytically solved in the stationary regime by the perturbation method in order to obtain linear and third-order nonlinear susceptibility of the medium with respect to the probe field. After a straightforward algebraic procedure, using the approximation of the slow-varying field envelope, the nonlinear Schrödinger equation for the probe field is obtained. It is numerically solved by applying the spectral Fourier split-step method. It is found that, for properly chosen values of the probe and control field detunings and control Rabi frequency, the probe field behaves as a solitary wave whose direction does not depend on the incident angle. Moreover, the regime consisting of Bloch-like oscillations can be identified. The simulation is performed by choosing the corresponding levels of Mg atoms. © 2019 Author(s).",
journal = "AIP Conference Proceedings",
title = "Spatial solitary like weak probe wave in the three-level Λ-type atoms",
volume = "2075",
pages = "030015",
doi = "10.1063/1.5091159"
}
Stevanović, L., Maluckov, A., Filipović, N.,& Pavlović, V.. (2019). Spatial solitary like weak probe wave in the three-level Λ-type atoms. in AIP Conference Proceedings, 2075, 030015.
https://doi.org/10.1063/1.5091159
Stevanović L, Maluckov A, Filipović N, Pavlović V. Spatial solitary like weak probe wave in the three-level Λ-type atoms. in AIP Conference Proceedings. 2019;2075:030015.
doi:10.1063/1.5091159 .
Stevanović, Ljiljana, Maluckov, Aleksandra, Filipović, Nikola, Pavlović, Vladan, "Spatial solitary like weak probe wave in the three-level Λ-type atoms" in AIP Conference Proceedings, 2075 (2019):030015,
https://doi.org/10.1063/1.5091159 . .

Spatial rogue waves in photorefractive SBN crystals

(2019)

TY  - JOUR
AU  - Hermann-Avigliano, Carla
AU  - Salinas, I A
AU  - Rivas, D. A.
AU  - Real, Bastian
AU  - Mančić, Ana
AU  - Mejía-Cortés, Cristian
AU  - Maluckov, Aleksandra
AU  - Poblete, Rodrigo Andres Vicencio
PY  - 2019
UR  - https://www.osapublishing.org/abstract.cfm?URI=ol-44-11-2807
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8223
AB  - We report on the excitation of large-amplitude waves, with a probability of around 1% of total peaks, on a photorefractive SBN crystal by using a simple experimental setup at room temperature. We excite the system using a narrow Gaussian beam and observe different dynamical regimes tailored by the value and time rate of an applied voltage. We identify two main dynamical regimes: a caustic one for energy spreading and a speckling one for peak emergence. Our observations are well described by a two-dimensional Schrödinger model with saturable local nonlinearity. © 2019 Optical Society of America.
T2  - Optics Letters
T1  - Spatial rogue waves in photorefractive SBN crystals
VL  - 44
IS  - 11
SP  - 2807
DO  - 10.1364/OL.44.002807
ER  - 
@article{
author = "Hermann-Avigliano, Carla and Salinas, I A and Rivas, D. A. and Real, Bastian and Mančić, Ana and Mejía-Cortés, Cristian and Maluckov, Aleksandra and Poblete, Rodrigo Andres Vicencio",
year = "2019",
abstract = "We report on the excitation of large-amplitude waves, with a probability of around 1% of total peaks, on a photorefractive SBN crystal by using a simple experimental setup at room temperature. We excite the system using a narrow Gaussian beam and observe different dynamical regimes tailored by the value and time rate of an applied voltage. We identify two main dynamical regimes: a caustic one for energy spreading and a speckling one for peak emergence. Our observations are well described by a two-dimensional Schrödinger model with saturable local nonlinearity. © 2019 Optical Society of America.",
journal = "Optics Letters",
title = "Spatial rogue waves in photorefractive SBN crystals",
volume = "44",
number = "11",
pages = "2807",
doi = "10.1364/OL.44.002807"
}
Hermann-Avigliano, C., Salinas, I. A., Rivas, D. A., Real, B., Mančić, A., Mejía-Cortés, C., Maluckov, A.,& Poblete, R. A. V.. (2019). Spatial rogue waves in photorefractive SBN crystals. in Optics Letters, 44(11), 2807.
https://doi.org/10.1364/OL.44.002807
Hermann-Avigliano C, Salinas IA, Rivas DA, Real B, Mančić A, Mejía-Cortés C, Maluckov A, Poblete RAV. Spatial rogue waves in photorefractive SBN crystals. in Optics Letters. 2019;44(11):2807.
doi:10.1364/OL.44.002807 .
Hermann-Avigliano, Carla, Salinas, I A, Rivas, D. A., Real, Bastian, Mančić, Ana, Mejía-Cortés, Cristian, Maluckov, Aleksandra, Poblete, Rodrigo Andres Vicencio, "Spatial rogue waves in photorefractive SBN crystals" in Optics Letters, 44, no. 11 (2019):2807,
https://doi.org/10.1364/OL.44.002807 . .
 3 5 5 6

Matter wave soliton solutions for driven Gross–Pitaevskii equation with distributed coefficients

(2019)

TY  - JOUR
AU  - Pal, Ritu
AU  - Loomba, Shally
AU  - Kumar, Choragudi Nagaraja
AU  - Milović, Daniela M.
AU  - Maluckov, Aleksandra
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8036
AB  - We have obtained the matter wave soliton solution for the driven nonautonomous GP equation with quadratic–cubic nonlinearities. We have revealed their interesting dynamical features for the experimentally realizable form of nonlinear interactions. Additionally, we have described that by suitably choosing some system parameters, we can control their characteristics such as amplitude and width etc. We have found that our results/solutions are stable and can be applied for future applications.
T2  - Annals of Physics
T1  - Matter wave soliton solutions for driven Gross–Pitaevskii equation with distributed coefficients
VL  - 401
SP  - 116
EP  - 129
DO  - 10.1016/j.aop.2019.01.002
ER  - 
@article{
author = "Pal, Ritu and Loomba, Shally and Kumar, Choragudi Nagaraja and Milović, Daniela M. and Maluckov, Aleksandra",
year = "2019",
abstract = "We have obtained the matter wave soliton solution for the driven nonautonomous GP equation with quadratic–cubic nonlinearities. We have revealed their interesting dynamical features for the experimentally realizable form of nonlinear interactions. Additionally, we have described that by suitably choosing some system parameters, we can control their characteristics such as amplitude and width etc. We have found that our results/solutions are stable and can be applied for future applications.",
journal = "Annals of Physics",
title = "Matter wave soliton solutions for driven Gross–Pitaevskii equation with distributed coefficients",
volume = "401",
pages = "116-129",
doi = "10.1016/j.aop.2019.01.002"
}
Pal, R., Loomba, S., Kumar, C. N., Milović, D. M.,& Maluckov, A.. (2019). Matter wave soliton solutions for driven Gross–Pitaevskii equation with distributed coefficients. in Annals of Physics, 401, 116-129.
https://doi.org/10.1016/j.aop.2019.01.002
Pal R, Loomba S, Kumar CN, Milović DM, Maluckov A. Matter wave soliton solutions for driven Gross–Pitaevskii equation with distributed coefficients. in Annals of Physics. 2019;401:116-129.
doi:10.1016/j.aop.2019.01.002 .
Pal, Ritu, Loomba, Shally, Kumar, Choragudi Nagaraja, Milović, Daniela M., Maluckov, Aleksandra, "Matter wave soliton solutions for driven Gross–Pitaevskii equation with distributed coefficients" in Annals of Physics, 401 (2019):116-129,
https://doi.org/10.1016/j.aop.2019.01.002 . .
 8 4 6

Numerical study of high intensity events in the supercontinuum generation in the presence of input chirp

(2019)

TY  - JOUR
AU  - Veljković, Marija
AU  - Mančić, Ana
AU  - Milović, Daniela M.
AU  - Maluckov, Aleksandra
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8453
AB  - We examine the supercontinuum (SC) dependence on the chirp of the input laser beam and effects of input pulse noise. Simultaneously, we investigate the relation between the SC generation and creation of localized high intensity events. We show that despite their low probability, these events inevitably appear in the SC in our setup. Their devastating role in the information transfer stimulates the research aiming for a deeper understanding of these phenomena which is of high importance in different fields of science, ranging from material science to telecommunications. This study can be considered as a step forward in tracing a route for controlling high intensity events. © 2019 Elsevier GmbH
T2  - Optik
T1  - Numerical study of high intensity events in the supercontinuum generation in the presence of input chirp
VL  - 196
SP  - 163180
DO  - 10.1016/j.ijleo.2019.163180
ER  - 
@article{
author = "Veljković, Marija and Mančić, Ana and Milović, Daniela M. and Maluckov, Aleksandra",
year = "2019",
abstract = "We examine the supercontinuum (SC) dependence on the chirp of the input laser beam and effects of input pulse noise. Simultaneously, we investigate the relation between the SC generation and creation of localized high intensity events. We show that despite their low probability, these events inevitably appear in the SC in our setup. Their devastating role in the information transfer stimulates the research aiming for a deeper understanding of these phenomena which is of high importance in different fields of science, ranging from material science to telecommunications. This study can be considered as a step forward in tracing a route for controlling high intensity events. © 2019 Elsevier GmbH",
journal = "Optik",
title = "Numerical study of high intensity events in the supercontinuum generation in the presence of input chirp",
volume = "196",
pages = "163180",
doi = "10.1016/j.ijleo.2019.163180"
}
Veljković, M., Mančić, A., Milović, D. M.,& Maluckov, A.. (2019). Numerical study of high intensity events in the supercontinuum generation in the presence of input chirp. in Optik, 196, 163180.
https://doi.org/10.1016/j.ijleo.2019.163180
Veljković M, Mančić A, Milović DM, Maluckov A. Numerical study of high intensity events in the supercontinuum generation in the presence of input chirp. in Optik. 2019;196:163180.
doi:10.1016/j.ijleo.2019.163180 .
Veljković, Marija, Mančić, Ana, Milović, Daniela M., Maluckov, Aleksandra, "Numerical study of high intensity events in the supercontinuum generation in the presence of input chirp" in Optik, 196 (2019):163180,
https://doi.org/10.1016/j.ijleo.2019.163180 . .
 4 2

ECG derived feature combination versus single feature in predicting defibrillation success in out-of-hospital cardiac arrested patients

(2018)

TY  - JOUR
AU  - Ivanović, Marija D.
AU  - Ring, Matthias
AU  - Baronio, Fabio
AU  - Calza, Stefano
AU  - Maluckov, Aleksandra
AU  - Eskofier, Bjoern Michael
PY  - 2018
UR  - http://stacks.iop.org/2057-1976/5/i=1/a=015012?key=crossref.179380a6d1fbac3633b726787a95feb5
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8095
AB  - Objective: Algorithms to predict shock outcome based on ventricular fibrillation (VF) waveform features are potentially useful tool to optimize defibrillation strategy (immediate defibrillation versus cardiopulmonary resuscitation). Researchers have investigated numerous predictive features and classification methods using single VF feature and/or their combinations, however reported predictabilities are not consistent. The purpose of this study was to validate whether combining VF features can enhance the prediction accuracy in comparison to single feature. Approach: The analysis was performed in 3 stages: feature extraction, preprocessing and feature selection and classification. Twenty eight predictive features were calculated on 4s episode of the pre-shock VF signal. The preprocessing included instances normalization and oversampling. Seven machine learning algorithms were employed for selecting the best performin single feature and combination of features using wrapper method: Logistic Regression (LR), Naïve-Bayes (NB), Decision tree (C4.5), AdaBoost.M1 (AB), Support Vector Machine (SVM), Nearest Neighbour (NN) and Random Forest (RF). Evaluation of the algorithms was performed by nested 10 fold cross-validation procedure. Main results: A total of 251 unbalanced first shocks (195 unsuccessful and 56 successful) were oversampled to 195 instances in each class. Performance metric based on average accuracy of feature combination has shown that LR and NB exhibit no improvement, C4.5 and AB an improvement not greater than 1% and SVM, NN and RF an improvement greater than 5% in predicting defibrillation outcome in comparison to the best single feature. Significance: By performing wrapper method to select best performing feature combination the non-linear machine learning strategies (SVM, NN, RF) can improve defibrillation prediction performance. © 2018 IOP Publishing Ltd.
T2  - Biomedical Physics & Engineering Express
T1  - ECG derived feature combination versus single feature in predicting defibrillation success in out-of-hospital cardiac arrested patients
VL  - 5
IS  - 1
SP  - 015012
DO  - 10.1088/2057-1976/aaebec
ER  - 
@article{
author = "Ivanović, Marija D. and Ring, Matthias and Baronio, Fabio and Calza, Stefano and Vukčević, Vladan  and Hadžievski, Ljupčo and Maluckov, Aleksandra and Eskofier, Bjoern Michael",
year = "2018",
abstract = "Objective: Algorithms to predict shock outcome based on ventricular fibrillation (VF) waveform features are potentially useful tool to optimize defibrillation strategy (immediate defibrillation versus cardiopulmonary resuscitation). Researchers have investigated numerous predictive features and classification methods using single VF feature and/or their combinations, however reported predictabilities are not consistent. The purpose of this study was to validate whether combining VF features can enhance the prediction accuracy in comparison to single feature. Approach: The analysis was performed in 3 stages: feature extraction, preprocessing and feature selection and classification. Twenty eight predictive features were calculated on 4s episode of the pre-shock VF signal. The preprocessing included instances normalization and oversampling. Seven machine learning algorithms were employed for selecting the best performin single feature and combination of features using wrapper method: Logistic Regression (LR), Naïve-Bayes (NB), Decision tree (C4.5), AdaBoost.M1 (AB), Support Vector Machine (SVM), Nearest Neighbour (NN) and Random Forest (RF). Evaluation of the algorithms was performed by nested 10 fold cross-validation procedure. Main results: A total of 251 unbalanced first shocks (195 unsuccessful and 56 successful) were oversampled to 195 instances in each class. Performance metric based on average accuracy of feature combination has shown that LR and NB exhibit no improvement, C4.5 and AB an improvement not greater than 1% and SVM, NN and RF an improvement greater than 5% in predicting defibrillation outcome in comparison to the best single feature. Significance: By performing wrapper method to select best performing feature combination the non-linear machine learning strategies (SVM, NN, RF) can improve defibrillation prediction performance. © 2018 IOP Publishing Ltd.",
journal = "Biomedical Physics & Engineering Express",
title = "ECG derived feature combination versus single feature in predicting defibrillation success in out-of-hospital cardiac arrested patients",
volume = "5",
number = "1",
pages = "015012",
doi = "10.1088/2057-1976/aaebec"
}
Ivanović, M. D., Ring, M., Baronio, F., Calza, S., Vukčević, V., Hadžievski, L., Maluckov, A.,& Eskofier, B. M.. (2018). ECG derived feature combination versus single feature in predicting defibrillation success in out-of-hospital cardiac arrested patients. in Biomedical Physics & Engineering Express, 5(1), 015012.
https://doi.org/10.1088/2057-1976/aaebec
Ivanović MD, Ring M, Baronio F, Calza S, Vukčević V, Hadžievski L, Maluckov A, Eskofier BM. ECG derived feature combination versus single feature in predicting defibrillation success in out-of-hospital cardiac arrested patients. in Biomedical Physics & Engineering Express. 2018;5(1):015012.
doi:10.1088/2057-1976/aaebec .
Ivanović, Marija D., Ring, Matthias, Baronio, Fabio, Calza, Stefano, Vukčević, Vladan , Hadžievski, Ljupčo, Maluckov, Aleksandra, Eskofier, Bjoern Michael, "ECG derived feature combination versus single feature in predicting defibrillation success in out-of-hospital cardiac arrested patients" in Biomedical Physics & Engineering Express, 5, no. 1 (2018):015012,
https://doi.org/10.1088/2057-1976/aaebec . .
 1 5 4 5

Statistics of vector Manakov rogue waves

(2018)

TY  - JOUR
AU  - Mančić, Ana
AU  - Baronio, Fabio
AU  - Wabnitz, Stefan
AU  - Maluckov, Aleksandra
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7797
AB  - We present a statistical analysis based on the height and return-time probabilities of high-amplitude wave events in both focusing and defocusing Manakov systems. We find that analytical rational or semirational solutions, associated with extreme, rogue wave (RW) structures, are the leading high-amplitude events in this system. We define the thresholds for classifying an extreme wave event as a RW. Our results indicate that there is a strong relationship between the type of RW and the mechanism which is responsible for its creation. Initially, high-amplitude events originate from modulation instability. Upon subsequent evolution, the interaction among these events prevails as the mechanism for RW creation. We suggest a strategy for confirming the basic properties of different extreme events. This involves the definition of proper statistical measures at each stage of the RW dynamics. Our results point to the need for redefining criteria for identifying RW events.
T2  - Physical Review E
T1  - Statistics of vector Manakov rogue waves
VL  - 98
IS  - 1
SP  - 012209
DO  - 10.1103/PhysRevE.98.012209
ER  - 
@article{
author = "Mančić, Ana and Baronio, Fabio and Hadžievski, Ljupčo and Wabnitz, Stefan and Maluckov, Aleksandra",
year = "2018",
abstract = "We present a statistical analysis based on the height and return-time probabilities of high-amplitude wave events in both focusing and defocusing Manakov systems. We find that analytical rational or semirational solutions, associated with extreme, rogue wave (RW) structures, are the leading high-amplitude events in this system. We define the thresholds for classifying an extreme wave event as a RW. Our results indicate that there is a strong relationship between the type of RW and the mechanism which is responsible for its creation. Initially, high-amplitude events originate from modulation instability. Upon subsequent evolution, the interaction among these events prevails as the mechanism for RW creation. We suggest a strategy for confirming the basic properties of different extreme events. This involves the definition of proper statistical measures at each stage of the RW dynamics. Our results point to the need for redefining criteria for identifying RW events.",
journal = "Physical Review E",
title = "Statistics of vector Manakov rogue waves",
volume = "98",
number = "1",
pages = "012209",
doi = "10.1103/PhysRevE.98.012209"
}
Mančić, A., Baronio, F., Hadžievski, L., Wabnitz, S.,& Maluckov, A.. (2018). Statistics of vector Manakov rogue waves. in Physical Review E, 98(1), 012209.
https://doi.org/10.1103/PhysRevE.98.012209
Mančić A, Baronio F, Hadžievski L, Wabnitz S, Maluckov A. Statistics of vector Manakov rogue waves. in Physical Review E. 2018;98(1):012209.
doi:10.1103/PhysRevE.98.012209 .
Mančić, Ana, Baronio, Fabio, Hadžievski, Ljupčo, Wabnitz, Stefan, Maluckov, Aleksandra, "Statistics of vector Manakov rogue waves" in Physical Review E, 98, no. 1 (2018):012209,
https://doi.org/10.1103/PhysRevE.98.012209 . .
 1 3 2 2

Statistics of vector Manakov rogue waves

(2018)

TY  - JOUR
AU  - Mančić, Ana
AU  - Baronio, Fabio
AU  - Wabnitz, Stefan
AU  - Maluckov, Aleksandra
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7798
UR  - https://arxiv.org/pdf/1807.01941.pdf
AB  - We present a statistical analysis based on the height and return-time probabilities of high-amplitude wave events in both focusing and defocusing Manakov systems. We find that analytical rational or semirational solutions, associated with extreme, rogue wave (RW) structures, are the leading high-amplitude events in this system. We define the thresholds for classifying an extreme wave event as a RW. Our results indicate that there is a strong relationship between the type of RW and the mechanism which is responsible for its creation. Initially, high-amplitude events originate from modulation instability. Upon subsequent evolution, the interaction among these events prevails as the mechanism for RW creation. We suggest a strategy for confirming the basic properties of different extreme events. This involves the definition of proper statistical measures at each stage of the RW dynamics. Our results point to the need for redefining criteria for identifying RW events.
T2  - Physical Review E
T1  - Statistics of vector Manakov rogue waves
VL  - 98
IS  - 1
SP  - 012209
DO  - 10.1103/PhysRevE.98.012209
ER  - 
@article{
author = "Mančić, Ana and Baronio, Fabio and Hadžievski, Ljupčo and Wabnitz, Stefan and Maluckov, Aleksandra",
year = "2018",
abstract = "We present a statistical analysis based on the height and return-time probabilities of high-amplitude wave events in both focusing and defocusing Manakov systems. We find that analytical rational or semirational solutions, associated with extreme, rogue wave (RW) structures, are the leading high-amplitude events in this system. We define the thresholds for classifying an extreme wave event as a RW. Our results indicate that there is a strong relationship between the type of RW and the mechanism which is responsible for its creation. Initially, high-amplitude events originate from modulation instability. Upon subsequent evolution, the interaction among these events prevails as the mechanism for RW creation. We suggest a strategy for confirming the basic properties of different extreme events. This involves the definition of proper statistical measures at each stage of the RW dynamics. Our results point to the need for redefining criteria for identifying RW events.",
journal = "Physical Review E",
title = "Statistics of vector Manakov rogue waves",
volume = "98",
number = "1",
pages = "012209",
doi = "10.1103/PhysRevE.98.012209"
}
Mančić, A., Baronio, F., Hadžievski, L., Wabnitz, S.,& Maluckov, A.. (2018). Statistics of vector Manakov rogue waves. in Physical Review E, 98(1), 012209.
https://doi.org/10.1103/PhysRevE.98.012209
Mančić A, Baronio F, Hadžievski L, Wabnitz S, Maluckov A. Statistics of vector Manakov rogue waves. in Physical Review E. 2018;98(1):012209.
doi:10.1103/PhysRevE.98.012209 .
Mančić, Ana, Baronio, Fabio, Hadžievski, Ljupčo, Wabnitz, Stefan, Maluckov, Aleksandra, "Statistics of vector Manakov rogue waves" in Physical Review E, 98, no. 1 (2018):012209,
https://doi.org/10.1103/PhysRevE.98.012209 . .
 1 3 2 2

Rogue Waves in Photorefractive SBN Crystals

(2018)

TY  - CONF
AU  - Poblete, Rodrigo Andres Vicencio
AU  - Salinas, I. A.
AU  - Hermann-Avigliano, Carla
AU  - Rivas, D. A.
AU  - Real, Bastian
AU  - Mejía-Cortés, Cristian
AU  - Mančić, Ana
AU  - Maluckov, Aleksandra
PY  - 2018
UR  - https://www.osapublishing.org/abstract.cfm?URI=LAOP-2018-W2E.4
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8020
AB  - We report on the excitation of large-amplitude waves, with very low probability, in photorefractive SBN crystals. We excite the system with a narrow gaussian beam and observe different dynamical regimes tailored by the crystal nonlinearity. © 2018 The Author (s)
C3  - Latin America Optics and Photonics Conference
T1  - Rogue Waves in Photorefractive SBN Crystals
VL  - Part F123-LAOP 2018
SP  - W2E.4
DO  - 10.1364/LAOP.2018.W2E.4
ER  - 
@conference{
author = "Poblete, Rodrigo Andres Vicencio and Salinas, I. A. and Hermann-Avigliano, Carla and Rivas, D. A. and Real, Bastian and Mejía-Cortés, Cristian and Mančić, Ana and Maluckov, Aleksandra",
year = "2018",
abstract = "We report on the excitation of large-amplitude waves, with very low probability, in photorefractive SBN crystals. We excite the system with a narrow gaussian beam and observe different dynamical regimes tailored by the crystal nonlinearity. © 2018 The Author (s)",
journal = "Latin America Optics and Photonics Conference",
title = "Rogue Waves in Photorefractive SBN Crystals",
volume = "Part F123-LAOP 2018",
pages = "W2E.4",
doi = "10.1364/LAOP.2018.W2E.4"
}
Poblete, R. A. V., Salinas, I. A., Hermann-Avigliano, C., Rivas, D. A., Real, B., Mejía-Cortés, C., Mančić, A.,& Maluckov, A.. (2018). Rogue Waves in Photorefractive SBN Crystals. in Latin America Optics and Photonics Conference, Part F123-LAOP 2018, W2E.4.
https://doi.org/10.1364/LAOP.2018.W2E.4
Poblete RAV, Salinas IA, Hermann-Avigliano C, Rivas DA, Real B, Mejía-Cortés C, Mančić A, Maluckov A. Rogue Waves in Photorefractive SBN Crystals. in Latin America Optics and Photonics Conference. 2018;Part F123-LAOP 2018:W2E.4.
doi:10.1364/LAOP.2018.W2E.4 .
Poblete, Rodrigo Andres Vicencio, Salinas, I. A., Hermann-Avigliano, Carla, Rivas, D. A., Real, Bastian, Mejía-Cortés, Cristian, Mančić, Ana, Maluckov, Aleksandra, "Rogue Waves in Photorefractive SBN Crystals" in Latin America Optics and Photonics Conference, Part F123-LAOP 2018 (2018):W2E.4,
https://doi.org/10.1364/LAOP.2018.W2E.4 . .