双腔光力学系统的稳态纠缠  

The steady-state entanglement in a two-cavity optomechanical system

作　　者：杨智博 明莹[1] 刘洪雨 YANG Zhibo;MING Ying;LIU Hongyu(College of Science,Yanbian University,Yanji 133002,China)

机构地区：[1]延边大学理学院,吉林延吉133002

出　　处：《延边大学学报（自然科学版）》2020年第2期129-133,共5页Journal of Yanbian University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(11647069);吉林省科技厅项目(20180520223JH)。

摘　　要：为了提高耦合腔光力学系统的稳态纠缠,将光学参量放大器放置到光学腔中并研究了其纠缠状.首先利用量子朗之万方程和线性化处理,求出系统的稳态解;然后将纠缠负对数作为纠缠判据,对系统的量子纠缠进行数值模拟.研究结果表明,含有光学参量放大器的系统不但可以显著增强稳态力学纠缠,而且可使纠缠不受热库环境温度的影响;因此,本文方案可为操控力学系统间的量子纠缠提供参考.In order to improve the steady-state entanglement of the coupled cavity photomechanical system, one selected a cascade cavity optomechanical system for the study. First, the steady-state solution of the system is obtained by using the Langevin equation and linear processing. Then the entanglement negative logarithm is used as the entanglement criterion to simulate the quantum entanglement of the system. The results show that the system with an optical parametric amplifier can significantly enhance the steady-state mechanical entanglement, and the entanglement can not be affected by the ambient temperature of the heat reservoir. Therefore, this scheme provides an effective method for improving and manipulating quantum entanglement between mechanical systems.

关 键 词：腔光力学系统 稳态纠缠 光学参量放大器 

分 类 号：O431[机械工程—光学工程]