Optimizing quantum correlation dynamics by weak measurement in dissipative environment

被引：3

作者：

Du Shao-Jiang ^{[1
,2
]}

Xia Yun-Jie ^{[1
]}

Duan De-Yang ^{[1
]}

Zhang Lu ^{[1
]}

Gao Qiang ^{[1
]}

机构：

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

[2] Jining Univ, Dept Phys & Informat Engn, Qufu 273155, Peoples R China

来源：

CHINESE PHYSICS B | 2015年 / 24卷 / 04期

基金：

中国国家自然科学基金;

关键词：

quantum entanglement; quantum correlation; entanglement sudden death; weak measurement;

D O I：

10.1088/1674-1056/24/4/044205

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the protection of quantum correlations of two qubits in independent vacuum reservoirs by means of weak measurements. It is found that the weak measurement can reduce the amount of quantum correlation for one type of initial state at the beginning in a non-Markovian environment and meanwhile it can reduce the occurrence time of entanglement sudden death (ESD) in the process of time evolution. In a Markovian environment, the quantum entanglements of the two kinds of initial states decay rapidly and the weak measurement can further weaken the quantum entanglement, therefore in this case the entanglement cannot be optimized in the evolution process.

引用

页数：6

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