Bipartite quantum discord in a multiqubit spin chain

被引：12
|
作者：
Chernyavskiy, A. Y. [1 ]
Doronin, S. I. [2 ]
Fel'dman, E. B. [2 ]
机构：
[1] Russian Acad Sci, Inst Phys & Technol, Moscow 117218, Russia
[2] Russian Acad Sci, Inst Problems Chem Phys, Chernogolovka 142432, Moscow Region, Russia
来源：
PHYSICA SCRIPTA | 2014年 / T160卷
基金：
俄罗斯基础研究基金会;
关键词：
quantum information; quantum correlations; classical correlations; discord; optimization; spin chain; many-qubit systems;
D O I：
10.1088/0031-8949/2014/T160/014007
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
For the first time, we compute the quantum discord in bipartite systems containing up to nine qubits. An analytical expression is obtained for the discord in a bipartite system with three qubits. The dependence of the discord on the temperature and the structural parameter of the model is studied.
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页数：5
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