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Dynamical phase changes of the self-trapping of Bose-Einstein condensates and its characteristic of entanglement

Ma Yun Fu Li-Bin Yang Zhi-An Liu Jie

Dynamical phase changes of the self-trapping of Bose-Einstein condensates and its characteristic of entanglement

Ma Yun, Fu Li-Bin, Yang Zhi-An, Liu Jie
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  • Received Date:  30 October 2005
  • Accepted Date:  13 February 2006
  • Published Online:  20 November 2006

Dynamical phase changes of the self-trapping of Bose-Einstein condensates and its characteristic of entanglement

  • 1. (1)北京应用物理与计算数学研究所,北京 100088; (2)济南大学理学院,济南 250022

Abstract: In this paper, we exploit two-mode model to investigate the influence of quantum fluctuation on the self-trapping of the Bose-Einstein Condensate(BEC). We found that, even for the finite number of particles, the transition to self-trapping is still observed.In particular, because of the quantum fluctuation due to the finite number of particles, the critical phenomenon becomes fuzzily: the smaller the number of particles is, the more obviously fuzzily the critical phenomenon becomes. Quantum entanglement entropy is then introduced to depict the critical behavior near the transition point.

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