Dynamics of quantum discord in the purification process

Details Dynamics of quantum discord in the purification process Dynamics of quantum discord in the purification process

2011-01-13

arxiv.org/abs/1101.2568v1

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

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. We call this process quantum correlation purification in analogy with entanglement purification. 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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