| 引用本文: |
|
| Citation: |
|
计量
- 文章访问数: 4725
- PDF下载量: 2271
- 被引次数: 0
物理学报. 2006, 55(11): 5623-5628.
doi: 10.7498/aps.55.5623.
玻色-爱因斯坦凝聚体自囚禁现象的动力学相变及其量子纠缠特性
- 收稿日期: 2005-10-30
- 修回日期: 2006-02-13
- 刊出日期: 2006-11-20
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.
-
关键词:
- 玻色-爱因斯坦凝聚(BEC) /
- 自囚禁 /
- 纠缠熵
English Abstract
Dynamical phase changes of the self-trapping of Bose-Einstein condensates and its characteristic of entanglement
- Received Date:
30 October 2005
- Accepted Date:
13 February 2006
- Published Online:
20 November 2006
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.
下载:
