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Mean-Field Dynamics of a Two-Mode Bose-Einstein Condensate Subject to Decoherence |
CUI Bo, WU Song-Lin, YI Xue-Xi |
| School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 |
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CUI Bo, WU Song-Lin, YI Xue-Xi 2010 Chin. Phys. Lett. 27 070303 |
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Abstract 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.
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03.65.Bz
07.60.Ly
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Received: 14 January 2010
Published: 28 June 2010
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