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arXiv 1701.05071quant-ph
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纳米机械共振器耦合下两个氮空位中心的纠缠动力学

Entanglement dynamics of two nitrogen vacancy centers coupled by a nanomechanical resonator

Z. Toklikishvili, L. Chotorlishvili, S. K. Mishra, S. Stagraczynski, M. Schüler, A. R. P. Rau, J. Berakdar

摘要:

本文研究了由一个两端带有磁性尖端的双模纳米机械谐振器连接的两个相距较远的NV中心(金刚石中的氮空位)之间纠缠的时间演化。计算了作为纠缠度量的负性,发现两个自旋之间的纠缠随时间振荡,并且可以通过改变系统的参数来操纵。我们观察到了时间纠缠的突然死亡和周期性复苏的现象。为了研究量子退相干,我们实现了Lindblad主方程.尽管该模型很复杂,但在相当合理的假设下,该模型是可以解析求解的,并且表明退相干影响纠缠、突然消亡和时间上的复兴。

英文摘要:

In this paper we study the time evolution of the entanglement between two remote NV Centers (nitrogen vacancy in diamond) connected by a dual-mode nanomechanical resonator with magnetic tips on both sides. Calculating the negativity as a measure for the entanglement, we find that the entanglement between two spins oscillates with time and can be manipulated by varying the parameters of the system. We observed the phe- nomenon of a sudden death and the periodic revivals of entanglement in time. For the study of quantum deco- herence, we implement a Lindblad master equation. In spite of its complexity, the model is analytically solvable under fairly reasonable assumptions, and shows that the decoherence influences the entanglement, the sudden death, and the revivals in time.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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