Transition to miscibility in linearly coupled binary dipolar Bose-Einstein condensates

Journal Article · Wed Sep 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.033624· OSTI ID:21450620

Gligoric, Goran; Stepic, Milutin; Hadzievski, Ljupco ^[1]; Maluckov, Aleksandra ^[2]; Malomed, Boris A ^[3]

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1. Vinca Institute of Nuclear Sciences, Post Office Box 522, 11001 Belgrade (Serbia)
2. Faculty of Sciences and Mathematics, University of Nis, Post Office Box 224, 18001 Nis (Serbia)
3. Department of Physical Electronics, School of Electrical Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv IL-69978 (Israel)

We investigate the effects of dipole-dipole (DD) interactions on immiscibility-miscibility transitions (IMT's) in two-component Bose-Einstein condensates (BEC's) 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.

• OSTI ID: 21450620
• Journal Information: Physical Review. A, Vol. 82, Issue 3; Other Information: DOI: 10.1103/PhysRevA.82.033624; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
BOSE-EINSTEIN CONDENSATION
COMPUTERIZED SIMULATION
COUPLING
DIPOLE MOMENTS
DIPOLES
ELECTROMAGNETIC FIELDS
HARMONIC OSCILLATORS
ORIENTATION
POTENTIALS
SOLUBILITY
SPIN
TRAPPING
ANGULAR MOMENTUM
MULTIPOLES
PARTICLE PROPERTIES
SIMULATION