Unified scheme for correlations using linear relative entropy

被引:2
作者
Daoud, M. [1 ,2 ,3 ]
Ahl Laarriara, R. [4 ,5 ]
Kaydi, W. [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, Fac Sci, Dept Phys, Agadir, Morocco
[4] LPHE Modeling & Simulat, Fac Sci, Rabat, Morocco
[5] Ctr Phys & Math, Rabat, Morocco
关键词
QUANTUM; ENTANGLEMENT; STATE;
D O I
10.1016/j.physleta.2014.10.012
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A linearized variant of relative entropy is used to quantify in a unified scheme the different kinds of correlations in a bipartite quantum system. As illustration, we consider a two-qubit state with parity and exchange symmetries for which we determine the total, classical and quantum correlations. We also give the explicit expressions of its closest product state, closest classical state and the corresponding closest product state. A closed additive relation, involving the various correlations quantified by linear relative entropy, is derived. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:3501 / 3508
页数:8
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