Entanglement dynamics of multiqubit system in Markovian and non-Markovian reservoirs

被引:29
|
作者
Man, Z. X. [1 ]
Zhang, Y. J. [1 ]
Su, F. [2 ]
Xia, Y. J. [1 ]
机构
[1] Qufu Normal Univ, Shandong Prov Key Lab Laser Polarizat & Informat, Dept Phys, Qufu 273165, Peoples R China
[2] Jining Univ, Dept Chem & Chem Engn, Qufu 273155, Peoples R China
来源
EUROPEAN PHYSICAL JOURNAL D | 2010年 / 58卷 / 01期
基金
中国国家自然科学基金;
关键词
SUDDEN-DEATH; STATE;
D O I
10.1140/epjd/e2010-00094-7
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We study the entanglement dynamics of three qubits in contact with independent Markovian or non-Markovian reservoirs. The qubits are prepared in two types of GHZ-like or W-like states distinguished by initial excited-state populations. Though belonging to the same GHZ or W class of entanglement, the states with different initial excitations exhibit strikingly different dynamics. In addition, we show that the non-Markovian reservoirs can recover the multiqubit entanglement at instantaneous points or after a finite interval of entanglement disappearance. We also investigate the protection of multiqubit entanglement by the control of excitation emission via the detuning.
引用
收藏
页码:147 / 151
页数:5
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