We discuss the dynamics of Bose-Einstein condensates in a double-well potential subject to decoherence (or particle loss). Starting from the full many-body dynamics described by the master equation, an effective Gross-Pitaevskii-like equation is derived in the mean-field approximation. By numerically solving the GP equation, we find that macroscopic quantum self-trapping disappears for strong decoherence, while generalized self-trapping occurs under weak decoherence. The fixed points have been calculated, and we find that an abrupt change from elliptic to an attractor and a repeller occurs, reflecting the metastable behavior of the system around these points.
We discuss the dynamics of Bose-Einstein condensates in a double-well potential subject to decoherence (or particle loss). Starting from the full many-body dynamics described by the master equation, an effective Gross-Pitaevskii-like equation is derived in the mean-field approximation. By numerically solving the GP equation, we find that macroscopic quantum self-trapping disappears for strong decoherence, while generalized self-trapping occurs under weak decoherence. The fixed points have been calculated, and we find that an abrupt change from elliptic to an attractor and a repeller occurs, reflecting the metastable behavior of the system around these points.
CUI Bo;WU Song-Lin;YI Xue-Xi. Mean-Field Dynamics of a Two-Mode Bose-Einstein Condensate Subject to Decoherence[J]. 中国物理快报, 2010, 27(7): 70303-070303.
CUI Bo, WU Song-Lin, YI Xue-Xi. Mean-Field Dynamics of a Two-Mode Bose-Einstein Condensate Subject to Decoherence. Chin. Phys. Lett., 2010, 27(7): 70303-070303.
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