HILBERT-SCHMIDT MEASURE OF PAIRWISE QUANTUM DISCORD FOR THREE-QUBIT X STATES

被引：4
|
作者：
Daoud, M. [1 ,2 ,3 ]
Laamara, R. Ahl [4 ,5 ]
Seddik, S. [4 ]
机构：
[1] Max Planck Inst Phys Komplexer Syst, Dresden, Germany
[2] Abdus Salam Int Ctr Theoret Phys, Trieste, Italy
[3] Univ Ibnou Zohr, Dept Phys, Fac Sci, Agadir, Morocco
[4] LPHE Modeling & Simulat, Fac Sci, Rabat, Morocco
[5] Ctr Phys & Math, Rabat, Morocco
来源：
REPORTS ON MATHEMATICAL PHYSICS | 2015年 / 76卷 / 02期
关键词：
quantum information; entanglement; quantum discord; multi-qubit states; monogamy relation; ENTANGLEMENT; MONOGAMY;
D O I：
10.1016/S0034-4877(15)30030-6
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The Hilbert-Schmidt distance between a mixed three-qubit state and its closest state is used to quantify the amount of pairwise quantum correlations in a tripartite system. Analytical expressions of geometric quantum discord are derived. A particular attention is devoted to two special classes of three-qubit X states. They include three-qubit states of W, GHZ and Bell type. We also discuss the monogamy property of geometric quantum discord in some mixed three-qubit systems.
引用
收藏
页码：207 / 230
页数：24
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