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

Enhancement of quantum correlations between two particles under decoherence in finite-temperature environment
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有限温度环境下退相干下两个粒子之间量子相关性的增强

DOI:
10.1209/0295-5075/106/60003
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发表时间:
2014-06
期刊:
EPL
影响因子:
1.8
通讯作者:
Gui-Lu Long
Gui-Lu Long
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Nasibollah Doustimotlagh;Shuhao Wang;Chenglong You;Gui-Lu Long

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增强与有限温度环境相互作用的实际量子系统中的量子关联是量子信息处理中的一个重要课题。在本文中,我们利用弱测量和测量反转来增强由两个粒子组成的量子系统中的量子关联。研究了量子比特-量子比特和量子比特-量子比特量子系统在广义振幅阻尼通道下由局域量子不确定度测量的量子关联跃迁。我们表明,在弱测量和测量反转后,联合系统对退相干表现出更强的鲁棒性。
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.
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