arXiv quant-ph/02091222002-09quant-phcond-mat

双模玻色-爱因斯坦凝聚体的纠缠

Entanglement of two-mode Bose-Einstein condensates

Andrew P. Hines, Ross H. McKenzie, Gerard J. Milburn

备注：: 11 pages, 8 figures, submitted to Physical Review A, to be presented at the third UQ Mathematical Physics workshop, Oct. 4-6; changes made in response to referee comments
发表信息：: Phys.Rev.A67(2003)013609
DOI：: 10.1103/PhysRevA.67.013609

摘要：

研究了两种常见的双峰玻色-爱因斯坦凝聚体--一对隧道耦合的玻色-爱因斯坦凝聚体和原子-分子玻色-爱因斯坦凝聚体的纠缠特性。我们认为，纠缠是只有在物理意义上的系统被视为一个二分系统，其中的子系统是两个模式。粒子在凝聚态中的不可压缩性意味着原子成分在物理上是不可接近的，因此，与模式之间的纠缠不同，只要粒子保持在凝聚态中，单个粒子之间的纠缠程度就与实验无关。我们计算了两个双模凝聚体的精确基态的模间纠缠，并考虑了隧道耦合情况下的纠缠动力学。

英文摘要：

We investigate the entaglement characteristics of two general bimodal Bose-Einstein condensates - a pair of tunnel-coupled Bose-Einstein condensates and the atom-molecule Bose-Einstein condensate. We argue that the entanglement is only physically meaningful if the system is viewed as a bipartite system, where the subsystems are the two modes. The indistinguishibility of the particles in the condensate means that the atomic constituents are physically inaccessible and thus the degree of entanglement between individual particles, unlike the entanglement between the modes, is not experimentally relevant so long as the particles remain in the condensed state. We calculate the entanglement between the modes for the exact ground state of the two bimodal condensates and consider the dynamics of the entanglement in the tunnel-coupled case.

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英文摘要：

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