Decoherence and Entanglement in Two-mode Squeezed Vacuum States

Details Decoherence and Entanglement in Two-mode Squeezed Vacuum States Decoherence and Entanglement in Two-mode Squeezed Vacuum States

2000-06-22

arxiv.org/abs/quant-ph/0006100v1

Phys. Rev. A 63, 022305 (2001)

Physics

Quantum Physics

5 pages, RevTex, 3 eps figures

Scientific paper

10.1103/PhysRevA.63.022305

I investigate the decoherence of two-mode squeezed vacuum states by analyzing the relative entropy of entanglement. I consider two sources of decoherence: (i) the phase damping and (ii) the amplitude damping due to the coupling to the thermal environment. In particular, I give the exact value of the relative entropy of entanglement for the phase damping model. For the amplitude damping model, I give an upper bound for the relative entropy of entanglement, which turns out to be a good approximation for the entanglement measure in usual experimental situations.

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