Decoherence and Entanglement in Two-mode Squeezed Vacuum States
Quantum Physics
2009-11-06 v1
Abstract
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.
Cite
@article{arxiv.quant-ph/0006100,
title = {Decoherence and Entanglement in Two-mode Squeezed Vacuum States},
author = {Tohya Hiroshima},
journal= {arXiv preprint arXiv:quant-ph/0006100},
year = {2009}
}
Comments
5 pages, RevTex, 3 eps figures