Transition to miscibility in linearly coupled binary dipolar Bose-Einstein condensates
Апстракт
We investigate the effects of dipole-dipole (DD) interactions on immiscibility-miscibility transitions (IMTs) in two-component Bose-Einstein condensates (BECs) trapped in the harmonic-oscillator (HO) potential, with the components linearly coupled by a resonant electromagnetic field (accordingly, the components represent two different spin states of the same atom). The problem is studied by means of direct numerical simulations. Different mutual orientations of the dipolar moments in the two components are considered. It is shown that, in the binary BEC formed by dipoles with the same orientation and equal magnitudes, the IMT cannot be induced by the DD interaction alone, being possible only in the presence of the linear coupling between the components, while the miscibility threshold is affected by the DD interactions. However, in the binary condensate with the two dipolar components polarized in opposite directions, the IMT can be induced without any linear coupling. Further, we demo...nstrate that those miscible and immiscible localized states, formed in the presence of the DD interactions, which are unstable evolve into robust breathers, which tend to keep the original miscibility or immiscibility, respectively. An exception is the case of a very strong DD attraction, when narrow stationary modes are destroyed by the instability. The binary BEC composed of copolarized dipoles with different magnitudes are briefly considered as well.
Извор:
Physical Review A, 2010, 82, 3Финансирање / пројекти:
- Ministry of Science, Serbia [141034], German-Israel Foundation [149/2006]
DOI: 10.1103/PhysRevA.82.033624
ISSN: 1050-2947
WoS: 000282313000012
Scopus: 2-s2.0-77957346824
Колекције
Институција/група
VinčaTY - JOUR AU - Gligorić, Goran AU - Maluckov, Aleksandra AU - Stepić, Milutin AU - Hadžievski, Ljupčo AU - Malomed, Boris A. PY - 2010 UR - https://vinar.vin.bg.ac.rs/handle/123456789/4117 AB - We investigate the effects of dipole-dipole (DD) interactions on immiscibility-miscibility transitions (IMTs) in two-component Bose-Einstein condensates (BECs) trapped in the harmonic-oscillator (HO) potential, with the components linearly coupled by a resonant electromagnetic field (accordingly, the components represent two different spin states of the same atom). The problem is studied by means of direct numerical simulations. Different mutual orientations of the dipolar moments in the two components are considered. It is shown that, in the binary BEC formed by dipoles with the same orientation and equal magnitudes, the IMT cannot be induced by the DD interaction alone, being possible only in the presence of the linear coupling between the components, while the miscibility threshold is affected by the DD interactions. However, in the binary condensate with the two dipolar components polarized in opposite directions, the IMT can be induced without any linear coupling. Further, we demonstrate that those miscible and immiscible localized states, formed in the presence of the DD interactions, which are unstable evolve into robust breathers, which tend to keep the original miscibility or immiscibility, respectively. An exception is the case of a very strong DD attraction, when narrow stationary modes are destroyed by the instability. The binary BEC composed of copolarized dipoles with different magnitudes are briefly considered as well. T2 - Physical Review A T1 - Transition to miscibility in linearly coupled binary dipolar Bose-Einstein condensates VL - 82 IS - 3 DO - 10.1103/PhysRevA.82.033624 ER -
@article{ author = "Gligorić, Goran and Maluckov, Aleksandra and Stepić, Milutin and Hadžievski, Ljupčo and Malomed, Boris A.", year = "2010", abstract = "We investigate the effects of dipole-dipole (DD) interactions on immiscibility-miscibility transitions (IMTs) in two-component Bose-Einstein condensates (BECs) trapped in the harmonic-oscillator (HO) potential, with the components linearly coupled by a resonant electromagnetic field (accordingly, the components represent two different spin states of the same atom). The problem is studied by means of direct numerical simulations. Different mutual orientations of the dipolar moments in the two components are considered. It is shown that, in the binary BEC formed by dipoles with the same orientation and equal magnitudes, the IMT cannot be induced by the DD interaction alone, being possible only in the presence of the linear coupling between the components, while the miscibility threshold is affected by the DD interactions. However, in the binary condensate with the two dipolar components polarized in opposite directions, the IMT can be induced without any linear coupling. Further, we demonstrate that those miscible and immiscible localized states, formed in the presence of the DD interactions, which are unstable evolve into robust breathers, which tend to keep the original miscibility or immiscibility, respectively. An exception is the case of a very strong DD attraction, when narrow stationary modes are destroyed by the instability. The binary BEC composed of copolarized dipoles with different magnitudes are briefly considered as well.", journal = "Physical Review A", title = "Transition to miscibility in linearly coupled binary dipolar Bose-Einstein condensates", volume = "82", number = "3", doi = "10.1103/PhysRevA.82.033624" }
Gligorić, G., Maluckov, A., Stepić, M., Hadžievski, L.,& Malomed, B. A.. (2010). Transition to miscibility in linearly coupled binary dipolar Bose-Einstein condensates. in Physical Review A, 82(3). https://doi.org/10.1103/PhysRevA.82.033624
Gligorić G, Maluckov A, Stepić M, Hadžievski L, Malomed BA. Transition to miscibility in linearly coupled binary dipolar Bose-Einstein condensates. in Physical Review A. 2010;82(3). doi:10.1103/PhysRevA.82.033624 .
Gligorić, Goran, Maluckov, Aleksandra, Stepić, Milutin, Hadžievski, Ljupčo, Malomed, Boris A., "Transition to miscibility in linearly coupled binary dipolar Bose-Einstein condensates" in Physical Review A, 82, no. 3 (2010), https://doi.org/10.1103/PhysRevA.82.033624 . .