Quantum discord of Bell cat-states under amplitude damping
Quantum Physics
2015-06-11 v1
Abstract
The evolution of pairwise quantum correlations of Bell cat-states under amplitude damping is examined using the concept of quantum discord which goes beyond entanglement. A closed expression of the quantum discord is explicitly derived. We used of the Koashi-Winter relation. A relation which facilitates the optimization process of the conditional entropy. We also discuss the temporal evolution of bipartite quantum correlations under a dephasing channel and compare the behaviors of quantum discord and entanglement whose properties are characterized through the concurrence.
Keywords
Cite
@article{arxiv.1210.8309,
title = {Quantum discord of Bell cat-states under amplitude damping},
author = {M. Daoud and R. Ahl Laamara},
journal= {arXiv preprint arXiv:1210.8309},
year = {2015}
}