Entanglement of two-mode Bose-Einstein condensates

被引：149
作者：
Hines, AP [1 ]
McKenzie, RH [1 ]
Milburn, GJ [1 ]
机构：
[1] Univ Queensland, Dept Phys, Ctr Quantum Comp Technol, St Lucia, Qld 4072, Australia
来源：
PHYSICAL REVIEW A | 2003年 / 67卷 / 01期
关键词：
D O I：
10.1103/PhysRevA.67.013609
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We investigate the entanglement 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 two 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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页数：10
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