量子电子学报, 2020, 37 (1): 63, 网络出版: 2020-04-03   

3Λ型三能级原子诱导动镜和腔场的稳态纠缠

Stable entanglement of movable mirror and cavity field generated viaΛ-type three-level atoms
作者单位
安徽理工大学力学与光电物理学院, 安徽 淮南 232001
摘要
提出了一个在法布里-帕罗腔中由Λ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。
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.

张彩云, 潘桂侠, 李虎, 陈华俊, 昌语. 3Λ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. ZHANG Caiyun, PAN Guixia, LI Hu, CHEN Huajun, CHANG Yu. Stable entanglement of movable mirror and cavity field generated viaΛ-type three-level atoms[J]. Chinese Journal of Quantum Electronics, 2020, 37(1): 63.

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