Quantum Nonlocality for a Mixed Entangled Coherent State

Details Quantum Nonlocality for a Mixed Entangled Coherent State Quantum Nonlocality for a Mixed Entangled Coherent State

2001-09-24

arxiv.org/abs/quant-ph/0109121v2

J. Mod. Opt., Vol. 49, Special issue for QEP 15, 851-864 (2002).

Physics

Quantum Physics

20 pages, 7 figures. To be published in J. Mod. Opt

Scientific paper

10.1080/09500340110109449

Quantum nonlocality is tested for an entangled coherent state, interacting with a dissipative environment. A pure entangled coherent state violates Bell's inequality regardless of its coherent amplitude. The higher the initial nonlocality, the more rapidly quantum nonlocality is lost. The entangled coherent state can also be investigated in the framework of $2\times2$ Hilbert space. The quantum nonlocality persists longer in $2\times2$ Hilbert space. When it decoheres it is found that the entangled coherent state fails the nonlocality test, which contrasts with the fact that the decohered entangled state is always entangled.

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