Change in the adiabatic invariant in a nonlinear two-mode model of Feshbach resonance passage

PHYSICA D-NONLINEAR PHENOMENA

卷:232

Article

Itin, A. P. ; Vasiliev, A. A. ; Krishna, G. ; Watanabe, S.

关键词: adiabatic invariants;    destruction of adiabatic invariance;    separatrix crossing;    nonlinear Landau-Zener model;    feshbach resonance;    classical action;    chaos;    nonadiabatic transition;   

DOI  :  10.1016/j.physd.2007.06.001

来源: Elsevier

【 摘 要 】

Mean-field approach has recently been used to model coupled atom-molecular Bose-Einstein condensates (BEC) and coupled Fermi-Bose condensates near Feshbach resonance. Sweeping of magnetic field across the resonance gives a new (nonlinear) version of Landau-Zener problem. We investigate the structure of the corresponding classical phase space and calculate change in the action which corresponds to finite-rate efficiency of the sweep. We consider the case of nonzero initial action, which corresponds to some finite initial molecular fraction. (c) 2007 Elsevier B.V. All rights reserved.

【 授权许可】

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