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COHERENT AND INCOHERENT CONTENTS OF CORRELATIONS
Journal article   Peer reviewed

COHERENT AND INCOHERENT CONTENTS OF CORRELATIONS

Kavan Modi and Mile Gu
International journal of modern physics. B, Condensed matter physics, statistical physics, applied physics, Vol.27(1-3), pp.1345027-1345012
30/01/2013

Abstract

Physical Sciences Physics Physics, Applied Physics, Condensed Matter Physics, Mathematical Science & Technology
We examine bipartite and multipartite correlations within the construct of unitary orbits. We show that the set of product states is a very small subset of set of all possible states, while all unitary orbits contain classically correlated states. Using this we give meaning to degeneration of quantum correlations due to a unitary interactions, which we call coherent correlations. The remaining classical correlations are called incoherent correlations and quantified in terms of the distance of the joint probability distributions to its marginals. Finally, we look at how entanglement looks in this picture for the two-qubit case.

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