Dynamics of quantum discord in the purification process

We investigate the dynamics of quantum discord during the purification process. In the case of Werner states, it is shown that quantum discord is increased after a round of purification protocol. Furthermore, quantum mutual information and classical correlation is also increased during this process. We also give an analytic expression for a class of higher dimensional states which have additive quantum discord.

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Year of publication:	2012
Authors:	Song, Wei ; Chen, Lin ; Yang, Ming ; Cao, Zhuo-Liang
Published in:	Physica A: Statistical Mechanics and its Applications. - Elsevier, ISSN 0378-4371. - Vol. 391.2012, 16, p. 4186-4190
Publisher:	Elsevier
Subject:	Quantum discord \| Dynamics process \| Purification

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Type of publication:	Article
Source:	RePEc - Research Papers in Economics

Persistent link: https://www.econbiz.de/10010874655