通过光参量放大器增强双腔磁子系统中的磁子-磁子纠缠

IF 0.4 4区物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY

Russian Physics Journal Pub Date : 2024-05-27 DOI:10.1007/s11182-024-03185-2

Noureddine Benrass, Abdelkader Hidki, Driss Aoune, Nabil Habiballah

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引用次数: 0

摘要

本文研究了带有光参量放大器（OPA）的双腔磁子系统中的磁子-磁子纠缠行为，其中两个腔都通过光子隧道过程耦合。利用标准的朗格文方法，提出了描述两种磁子模式的协方差矩阵的明确表达式，并通过对数负性进一步证明了间接耦合磁子的稳态是真正纠缠的。此外，还获得了实现磁子-磁子纠缠的最佳参数。研究表明，通过适当选择腔-腔耦合和 OPA 增益，可以增强纠缠对热浴负效应的稳健性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Enhancement of Magnon-Magnon Entanglement in a Double Cavity-Magnon System by Optical Parametric Amplifier

The paper investigates the behavior of the magnon-magnon entanglement in a double cavity-magnon system with optical parametric amplifiers (OPA) and where both cavities are coupled by the photon tunneling process. Using the standard Langevin approach, the explicit expression is suggested for the covariance matrix describing the two magnon modes and further proved by logarithmic negativity, that the steady state of the indirectly coupled magnons is genuinely entangled. Moreover, the best parameters are obtained to achieve the magnon-magnon entanglement. It is shown that the entanglement robustness against the negative effect of the thermal bath can be enhanced by a proper choice of both the cavity-cavity coupling and the OPA gain.

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来源期刊

Russian Physics Journal PHYSICS, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

50.00%

发文量

208

审稿时长

3-6 weeks

期刊介绍： Russian Physics Journal covers the broad spectrum of specialized research in applied physics, with emphasis on work with practical applications in solid-state physics, optics, and magnetism. Particularly interesting results are reported in connection with: electroluminescence and crystal phospors; semiconductors; phase transformations in solids; superconductivity; properties of thin films; and magnetomechanical phenomena.