Fidelity for Multimode Thermal Squeezed States
Quantum Physics
2009-10-31 v1
Abstract
In the theory of quantum transmission of information the concept of fidelity plays a fundamental role. An important class of channels, which can be experimentally realized in quantum optics, is that of Gaussian quantum channels. In this work we present a general formula for fidelity in the case of two arbitrary Gaussian states. From this formula one can get a previous result (H. Scutaru, J. Phys. A: Mat. Gen {\bf 31}, 3659 (1998)), for the case of a single mode; or, one can apply it to obtain a closed compact expression for multimode thermal states.
Cite
@article{arxiv.quant-ph/9907068,
title = {Fidelity for Multimode Thermal Squeezed States},
author = {Gh. -S. Paraoanu and H. Scutaru},
journal= {arXiv preprint arXiv:quant-ph/9907068},
year = {2009}
}
Comments
5 pages, RevTex, submitted to Phys. Rev. A