ENTANGLEMENT DYNAMICS OF THREE-QUBIT STATES UNDER A SPIN ENVIRONMENT

ENTANGLEMENT DYNAMICS OF THREE-QUBIT STATES UNDER A SPIN ENVIRONMENT
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自旋环境下三量子位态的纠缠动力学

DOI:
10.1142/s0219749911006739
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发表时间:
2011-11
影响因子:
1.2
通讯作者:
Wang, An Min
Wang, An Min
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Ma, Xiao San;Liu, Gao Sheng;Wang, An Min

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本文研究了自旋环境下三量子比特态的纠缠动力学。通过分析发现,三量子比特态的纠缠动力学不仅依赖于系统与环境之间的耦合强度和环境的自由度,还依赖于自旋环境的隧穿矩阵元和所关注的特定态.详细分析了GHZ态、W态和Werner态的纠缠动力学,并讨论了确定无消相干子空间的条件.
In this paper, we investigate the entanglement dynamics of three-qubit states under a spin environment. From the analysis, we find that the entanglement dynamics of the three-qubit states depends not only on the coupling strength between the system and the environment and the number of degrees of freedom of the environment but also on the tunneling matrix elements of the spin environment and the specific state of concern. Specifically, the entanglement dynamics of the GHZ state, the W state, and the Werner state have been analyzed in detail and the conditions to identify the decoherence-free subspaces of our model have been discussed.
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