Robustness of quantum discord to sudden death in nuclear magnetic resonance
被引:0
作者:
胥建卫
论文数: 0引用数: 0
h-index: 0
机构:
Key Laboratory for Radiation Physics and Technology, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610065, ChinaKey Laboratory for Radiation Physics and Technology, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610065, China
胥建卫
[1
]
论文数: 引用数:
h-index:
机构:
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
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.