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一维等离子体波导介导的两个量子比特的量子相干性和量子相关性。

Quantum coherence and quantum correlation of two qubits mediated by a one-dimensional plasmonic waveguide.

作者信息

Hu Zheng-Da, Liang Xiuye, Wang Jicheng, Zhang Yixin

出版信息

Opt Express. 2016 May 16;24(10):10817-28. doi: 10.1364/OE.24.010817.

Abstract

We investigate the dynamics of quantum coherence and quantum correlation of two qubits mediated by a one-dimensional plasmonic waveguide. The analytical expression of the dissipative dynamics of the two qubits is obtained for the initial X state. The dynamical behaviors of the quantum coherence and quantum correlation are shown to be largely dependent on the parameters of the initial state. Starting from a product state, quantum coherence and quantum correlation can be induced by the plasmonic waveguide. Under continuous drivings, steady quantum correlation can be obtained at specific distance larger than the operating wavelength and large values of steady quantum coherence are attainable at arbitrary distance. The detuning effect on the dissipation-driven generation of steady quantum coherence and quantum correlation is also explored.

摘要

我们研究了由一维等离子体波导介导的两个量子比特的量子相干和量子关联动力学。针对初始X态,得到了两个量子比特耗散动力学的解析表达式。结果表明,量子相干和量子关联的动力学行为在很大程度上依赖于初始态的参数。从乘积态出发,等离子体波导可以诱导量子相干和量子关联。在连续驱动下,在大于工作波长的特定距离处可以获得稳定的量子关联,并且在任意距离处都可以获得较大值的稳定量子相干。我们还探讨了失谐对耗散驱动产生稳定量子相干和量子关联的影响。

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