Time-dependent self-trapping of Bose-Einstein condensates in a double-well potential

Journal Article · Wed Dec 15 04:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.062105· OSTI ID:21528813

Cui, B; Wang, L C; Yi, X X ^[1]

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1. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)

Based on the mean-field approximation and a phase-space analysis, we discuss the dynamics of Bose-Einstein condensates (BECs) in a double-well potential. The condensates are found to be trapped in the time-dependent eigenstates of the effective Hamiltonian; we refer to this effect as time-dependent self-trapping of BECs. By comparison of this self-trapping with the adiabatic evolution, we find that adiabatic evolution beyond the traditional adiabatic condition can be achieved in BECs. Furthermore, the population imbalance of the BECs in the wells can be controlled by manipulating the atom-atom couplings and the driving field. The fixed points for the system are also calculated and discussed.

• OSTI ID: 21528813
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ADIABATIC APPROXIMATION
APPROXIMATIONS
ATOMS
BOSE-EINSTEIN CONDENSATION
CALCULATION METHODS
COUPLING
EIGENSTATES
EVOLUTION
HAMILTONIANS
MATHEMATICAL EVOLUTION
MATHEMATICAL OPERATORS
MATHEMATICAL SPACE
MEAN-FIELD THEORY
PHASE SPACE
POTENTIALS
QUANTUM OPERATORS
SPACE
TIME DEPENDENCE
TRAPPING