Dynamics of Nonground-State Bose-Einstein Condensates

Details Dynamics of Nonground-State Bose-Einstein Condensates Dynamics of Nonground-State Bose-Einstein Condensates

2005-04-11

arxiv.org/abs/cond-mat/0504249v1

J. Low Temp. Phys. 138 (2005) 657-662

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

latex file, 5 pages, 2 figures, Figs. 1,2 are not included

Scientific paper

10.1007/s10909-005-2279-y

Dilute Bose gases, cooled down to low temperatures below the Bose-Einstein condensation temperature, form coherent ensembles described by the Gross-Pitaevskii equation. Stationary solutions to the latter are topological coherent modes. The ground state, corresponding to the lowest energy level, defines the standard Bose-Einstein condensate, while the states with higher energy levels represent nonground-state condensates. The higher modes can be generated by alternating fields, whose frequencies are in resonance with the associated transition frequencies. The condensate with topological coherent modes exhibits a variety of nontrivial effects. Here it is demonstrated that the dynamical transition between the mode-locked and mode-unlocked regimes is accompanied by noticeable changes in the evolutional entanglement production.

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