Unified entropic measures of quantum correlations induced by local measurements

G.M. Bosyk, G. Bellomo, S. Zozor, M. Portesi and P.W. Lamberti

Physica A: Statistical Mechanics and its Applications, 2016, vol. 462, issue C, 930-939

Abstract: We introduce quantum correlation measures based on the minimal change in unified entropies induced by local rank-one projective measurements, divided by a factor that depends on the generalized purity of the system in the case of nonadditive entropies. In this way, we overcome the issue of the artificial increasing of the value of quantum correlation measures based on nonadditive entropies when an uncorrelated ancilla is appended to the system, without changing the computability of our entropic correlation measures with respect to the previous ones. Moreover, we recover as limiting cases the quantum correlation measures based on von Neumann and Rényi entropies (i.e., additive entropies), for which the adjustment factor becomes trivial. In addition, we distinguish between total and semiquantum correlations and obtain some inequalities between them. Finally, we obtain analytical expressions of the entropic correlation measures for typical quantum bipartite systems.

Keywords: Quantum correlations; Quantum unified entropies; Local projective measurements (search for similar items in EconPapers)
Date: 2016
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:462:y:2016:i:c:p:930-939

DOI: 10.1016/j.physa.2016.06.131

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