∧型三能级原子诱导动镜和腔场的稳态纠缠

量子电子学报 ›› 2020, Vol. 37 ›› Issue (1): 63-69.

∧型三能级原子诱导动镜和腔场的稳态纠缠

张彩云, 潘桂侠*,李虎,陈华俊,昌语

安徽理工大学力学与光电物理学院，安徽淮南 232001

收稿日期:2019-05-23 修回日期:2019-06-13 出版日期:2020-01-28 发布日期:2020-01-28
通讯作者: 潘桂侠 E-mail:panguixia58@126.com
作者简介:张彩云（1980-），女，安徽肥东人，硕士，讲师，主要从事量子光学方面的研究。Email：zcylh9@163.com
基金资助:
Supported by National Natural Science Foundation of China (国家自然科学基金, 11647001, 11804004), National College Students' Innovation and Entrepreneurship Training Program（大学生创新创业训练计划项目, 201910361097）

The stable entanglement of movable mirror and cavity field generated via Λ-type three-level atoms

ZHANG Caiyun, PAN Guixia , LI Hu, CHEN Huajun, CHANG Yu

School of Mechanics and Optoelectronics Physics, Anhui University of Science and Technology, Huainan 232001, China

Received:2019-05-23 Revised:2019-06-13 Published:2020-01-28 Online:2020-01-28

摘要/Abstract

摘要： 提出了一个在法布里-帕罗腔中由∧型三能级原子去纠缠动镜和腔场的方案，介绍了通过辐射压力产生光机械系统稳定纠缠的机理。研究表明，在原子介质存在的情况下，系统可以得到更大的稳定纠缠。所提方案使用西蒙判据判定纠缠，并采用纠缠负度量化系统的稳定宏观纠缠。当腔场和原子之间的耦合越大时，系统的纠缠越大。在原子的帮助下，系统的纠缠最大值从0.5增加到2.05。此外，考虑腔场耗散时，这种稳态宏观纠缠仍然存在。

关键词: 光机械系统, 原子介质, 朗之万方程, 稳态纠缠

Abstract: A scheme that Λ-type three-level atoms are used to entangle movable mirror and cavity field in a Fabry-Perot cavity is proposed. The mechanism that the stable entanglement of optomechanical system can be generated through radiation pressure is presented. It is shown that the larger stationary entanglement can be obtained with the existence of atomic mediums. The criterion of Simon is employed in the proposed scheme to determine the entanglement, and the logarithmic negativity is used to quantify the stable macroscopic entanglement of the system. It is found that the larger entanglement corresponds to the larger coupling between the cavity and the atoms. With the help of atoms, the maximum entanglement of the system increases from 0.5 to 2.05. And such macroscopic entanglement still exists even for bad cavity limits.

Key words: optomechanical system, atomic medium, Langevin equations, stable entanglement

中图分类号:

O469

张彩云潘桂侠李虎陈华俊昌语. ∧型三能级原子诱导动镜和腔场的稳态纠缠[J]. 量子电子学报, 2020, 37(1): 63-69.

ZHANG Caiyun, PAN Guixia , LI Hu, CHEN Huajun, CHANG Yu. The stable entanglement of movable mirror and cavity field generated via Λ-type three-level atoms[J]. Chinese Journal of Quantum Electronics, 2020, 37(1): 63-69.

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