【摘要】 研究了量子涨落对自囚禁现象的影响.采用玻色-爱因斯坦凝聚体(BEC)两模模型进行研究,发现有限粒子BEC系统自囚禁现象的发生同样存在临界现象,但是由于量子涨落的影响使得这个临界现象变得模糊,并且粒子数越小量子涨落的影响越明显.为了更加明确地描述有限粒子系统的自囚禁现象,通过系统各态平均占有概率的熵(简称平均熵)和平均纠缠熵来刻画自囚禁现象,并讨论自囚禁现象发生前后系统的纠缠特性.更多还原

【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.更多还原