Entanglement of two-mode Bose-Einstein condensates

Details Entanglement of two-mode Bose-Einstein condensates Entanglement of two-mode Bose-Einstein condensates

2002-09-24

arxiv.org/abs/quant-ph/0209122v2

Phys.Rev.A67(2003)013609

Physics

Quantum Physics

11 pages, 8 figures, submitted to Physical Review A, to be presented at the third UQ Mathematical Physics workshop, Oct. 4-6;

Scientific paper

10.1103/PhysRevA.67.013609

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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