Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2013-10-29

Journal: EUROPEAN PHYSICAL JOURNAL D

Included Journals: SCIE

Volume: 67

Issue: 10

ISSN: 1434-6060

Abstract: We study the nonclassical correlations in a two-qubit state by the perturbing local unitary operation method. We find that the definitions of various non-classicalities including quantum discord (QD), measurement-induced nonlocality (MIN) and so on usually do not have a unique definition when expressed as the perturbation of local unitary operations, so a given non-classicality can lead to different definitions of its dual non-classicality. In addition, it is shown that QD and MIN are not the corresponding dual expressions in a simple set of unitary operations, even though they are in their original definitions. In addition, we also consider the non-classicalities in general 2 circle times d dimensional systems.