Qubit disentanglement in local squeezed reservoirs

被引：10
|
作者：
Zhou, Xiang-Fa [1 ]
Zhang, Yong-Sheng [1 ]
Guo, Guang-Can [1 ]
机构：
[1] Univ Sci & Technol China, Key Lab Quantum Informat, Hefei 230026, Anhui, Peoples R China
来源：
PHYSICS LETTERS A | 2007年 / 363卷 / 04期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1016/j.physleta.2006.11.012
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We consider the influence of the local squeezed vacuum fields on two initially entangled two-qubit system. By considering the upper bound of entanglement under time evolution, we find that the decay of the quantum entanglement shows different behavior for different time scales (t >> max{(2 beta(A))(-1), (2 beta(B))(-1)} and t << min{(2 beta(A))(-1), (2 beta(B))(-1)}). The relative phase of the squeezing environment can also affect the entanglement dynamics profoundly. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：263 / 270
页数：8
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