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arXiv · 1308.0901

Comparison of quantum discord and relative entropy in some bipartite quantum systems

M. Mahdian·M. B. Arjmandi
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Abstract

The study of quantum correlations in High-dimensional bipartite systems is crucial for the development of quantum computing. We propose relative entropy as a distance measure of correlations may be measured by means of the distance from the quantum state to the closest classical-classical state. In particular, We establish relations between relative entropy and quantum discord quantifiers obtained by means of orthogonal projective measurements. We show that for symmetrical X-states density matrices the quantum discord is equal to relative entropy. At the end of paper, various examples of X-states such as two-qubit and qubit-qutrit have been demonstrated .

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M. Mahdian, M. B. Arjmandi. 2013-08-05. Comparison of quantum discord and relative entropy in some bipartite quantum systems. https://arxiv.org/abs/1308.0901

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