A note on one-way quantum deficit and quantum discord
Quantum Physics
2016-01-12 v1
Abstract
One-way quantum deficit and quantum discord are two important measures of quantum correlations. We revisit the relationship between them in two-qubit systems. We investigate the conditions that both one-way quantum deficit and quantum discord have the same optimal measurement ensembles, and demonstrate that one-way quantum deficit can be derived from the quantum discord for a class of X states. Moreover, we give an explicit relation between one-way quantum deficit and entanglement of formation. We show that under phase damping channel both one-way quantum deficit and quantum discord evolve exactly in the same way for four parameters X states. Some examples are presented in details.
Cite
@article{arxiv.1601.02313,
title = {A note on one-way quantum deficit and quantum discord},
author = {Biao-Liang Ye and Shao-Ming Fei},
journal= {arXiv preprint arXiv:1601.02313},
year = {2016}
}
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12 pages