A STUDY ON THE SUDDEN DEATH AND SUDDEN BIRTH OF ENTANGLEMENT IN AN OPEN SYSTEM

被引：6

作者：

Zhang, Ying-Jie ^{[1
]}

Xia, Yun-Jie ^{[1
]}

机构：

[1] Qufu Normal Univ, Shandong Prov Key Lab Laser Polarizat & Informat, Dept Phys, Qufu 273165, Peoples R China

来源：

INTERNATIONAL JOURNAL OF QUANTUM INFORMATION | 2009年 / 7卷 / 05期

基金：

美国国家科学基金会;

关键词：

Entanglement dynamics; entanglement sudden death (birth); purity; QUANTUM ENTANGLEMENT; DECOHERENCE; DYNAMICS; ENVIRONMENT; STATES; MODEL;

D O I：

10.1142/S0219749909004529

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

In this paper, we consider the entanglement dynamics of two cavities interacting with independent reservoirs. When the cavity entanglement suddenly disappeared, the reservoir entanglement suddenly and necessarily appears. We study the effect of purity of initial entangled state of two cavities on the entanglement evolution, and acquire that the purity of initial entangled state of two cavities can control the apparition time of the entanglement sudden death and the entanglement sudden birth. Also, we find that the conditions on the apparition of the entanglement sudden death and the entanglement sudden birth can be generalized when the initial entangled state of cavities is not pure, which is a complement to the result in the paper [Phys. Rev. Lett. 101 (2008) 080503] for the pure case.

引用

页码：949 / 957

页数：9

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