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[en] We suggest a measure of classical correlation in a two-qubit state, which is computable and implementable in experiments. As examples, we investigate the classical and quantum correlations in the Werner states and in a group of particular states mixed with three parts: an entangled, a separable and a product one. It is shown that the quantum correlation in a two-qubit state cannot exceed the classical correlation in the same state
Journal
Journal of Physics. A, Mathematical and Theoretical (Online); ISSN 1751-8121; 
; v. 41(12); [8 p.]
; v. 41(12); [8 p.]