Dynamics of quantum discord in the purification process

Wei Song, Lin Chen, Ming Yang and Zhuo-Liang Cao

Physica A: Statistical Mechanics and its Applications, 2012, vol. 391, issue 16, 4186-4190

Abstract: 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.

Keywords: Quantum discord; Dynamics process; Purification (search for similar items in EconPapers)
Date: 2012
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:391:y:2012:i:16:p:4186-4190

DOI: 10.1016/j.physa.2012.03.024

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