Robustness of quantum discord to sudden death in nuclear magnetic resonance

被引:0
作者
胥建卫 [1 ]
陈起辉 [2 ]
机构
[1] Key Laboratory for Radiation Physics and Technology, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610065, China
[2] Physics Department, Sichuan University, Chengdu 610065, China
基金
中央高校基本科研业务费专项资金资助;
关键词
quantum discord; nuclear magnetic resonance; concurrence; sudden death;
D O I
暂无
中图分类号
O413.1 [量子力学(波动力学、矩阵力学)]; O482.532 [];
学科分类号
070205 ; 0805 ; 080502 ; 0809 ;
摘要
We investigate the dynamics of the entanglement and quantum discord of two qubits in liquid state homonuclear nuclear magnetic resonance. Applying a phenomenological description for nuclear magnetic resonance under a relaxation process, and taking a group of typical parameters of nuclear magnetic resonance, we show that when a zero initial state experiences a relaxation process, its entanglement disappears completely after a sequence of so-called sudden deaths and revivals, while the quantum discord retains remarkable values after a sequence of oscillations. That is to say, the quantum discord is more robust than entanglement.
引用
收藏
页码:64 / 70
页数:7
相关论文
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[1]  
Ali M,Rau A R P,Alber G. Phys. Rev. A . 2010