Conditional purity and quantum correlation measures in two qubit mixed states

被引：1

作者：

Rebon, L. ^{[1
,2
]}

Rossignoli, R. ^{[1
,3
]}

Varga, J. J. M. ^{[4
]}

Gigena, N. ^{[1
]}

Canosa, N. ^{[1
]}

Iemmi, C. ^{[4
]}

Ledesma, S. ^{[4
]}

机构：

[1] Univ Nacl La Plata, CONICET, Dept Fis, Inst Fis La Plata, CC 67, RA-1900 La Plata, Buenos Aires, Argentina

[2] Univ Hamburg, Inst Laserphys, Luruper Chaussee 149, D-22761 Hamburg, Germany

[3] CICPBA, Buenos Aires, DF, Argentina

[4] Univ Buenos Aires, CONICET, FCEyN, Dept Fis, RA-1428 Buenos Aires, DF, Argentina

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2016年 / 49卷 / 21期

关键词：

quantum information; measures of quantum correlations; experimental test with single photons; DISCORD; ENTANGLEMENT;

D O I：

10.1088/0953-4075/49/21/215501

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We analyze and show experimental results of the conditional purity, the quantum discord and other related measures of quantum correlation in mixed two-qubit states constructed from a pair of photons in identical polarization states. The considered states are relevant for the description of spin pair states in interacting spin chains in a transverse magnetic field. We derive clean analytical expressions for the conditional local purity and other correlation measures obtained as a result of a remote local projective measurement, which are fully verified by the experimental results. A simple exact expression for the quantum discord of these states in terms of the maximum conditional purity is also derived.

引用

页码：1 / 9

页数：9

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