Non-classicalities via perturbing local unitary operations
Quantum Physics
2015-06-23 v1
Abstract
We study the nonclassical correlations in a two-qubit state by the perturbing local unitary operation method. We find that the definitions of various non-classicalities including quantum discord (QD), measurement-induced nonlocality (MIN) and so on usually do not have a unique definition when expressed as the perturbation of local unitary operations, so a given non-classicality can lead to different definitions of its dual non-classicality. In addition, it is shown that QD and MIN are not the corresponding dual expressions in a simple set of unitary operations, even though they are in their original definitions. In addition, we also consider the non-classicalities in general dimensional systems.
Cite
@article{arxiv.1411.7452,
title = {Non-classicalities via perturbing local unitary operations},
author = {Jun Zhang and Yang Zhang and Shao-xiong Wu and Chang-shui Yu},
journal= {arXiv preprint arXiv:1411.7452},
year = {2015}
}