Enhancement of quantum correlations between two particles under decoherence in finite-temperature environment

被引：14

作者：

Doustimotlagh, Nasibollah ^{[1
,2
]}

Wang, Shuhao ^{[1
,2
]}

You, Chenglong ^{[3
]}

Long, Gui-Lu ^{[1
,2
,4
,5
]}

机构：

[1] Tsinghua Univ, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China

[2] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

[3] Louisiana State Univ, Hearne Inst Theoret Phys, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[4] Tsinghua Natl Lab Informat Sci & Technol, Beijing 100084, Peoples R China

[5] Collaborat Innovat Ctr Quantum Matter, Beijing 100084, Peoples R China

来源：

EPL | 2014年 / 106卷 / 06期

基金：

中国国家自然科学基金;

关键词：

ERROR-CORRECTING CODES; WEAK MEASUREMENT; ENTANGLEMENT; COMPUTATION; REVERSAL; SYSTEMS;

D O I：

10.1209/0295-5075/106/60003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Enhancing the quantum correlations in realistic quantum systems interacting with the environment of finite temperature is an important subject in quantum information processing. In this paper, we use weak measurement and measurement reversal to enhance the quantum correlations in a quantum system consisting of two particles. The transitions of the quantum correlations measured by the local quantum uncertainty of qubit-qubit and qutrit-qutrit quantum systems under generalized amplitude damping channels are investigated. We show that, after the weak measurement and measurement reversal, the joint system shows more robustness against decoherence. Copyright (C) EPLA, 2014

引用

页数：6

共 33 条

[1] Good quantum error-correcting codes exist [J].