Nonreciprocal coupling induced entanglement enhancement in a double-cavity optomechanical system

作     者：Yuan-Yuan Liu Zhi-Ming Zhang Jun-Hao Liu Jin-Dong Wang Ya-Fei Yu 刘元元;张智明;刘军浩;王金东;於亚飞

作者机构：Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices(School of Information and Optoelectronic Science and Engineering)South China Normal UniversityGuangzhou 510006China Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum MaterialsSouth China Normal UniversityGuangzhou 510006China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2022年第31卷第9期

页      面：301-306页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 070201[理学-理论物理] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.12047520 61941501 61775062 11574092 61378012 91121023 62071186 and 61771205) 

主　　题：quantum entanglement double-cavity optomechanical system nonreciprocal coupling 

摘      要：We investigate the quantum entanglement in a double-cavity optomechanical system consisting of an optomechanical cavity and an auxiliary cavity,where the optomechanical cavity mode couples with the mechanical mode via radiation-pressure interaction,and simultaneously couples with the auxiliary cavity mode via nonreciprocal *** study the entanglement between the mechanical oscillator and the cavity modes when the two cavities are reciprocally or non-reciprocally *** logarithmic negativity E_(n)^((1))(E_(n)^((2)))is adopted to describe the entanglement degree between the mechanical mode and the optomechanical cavity mode(the auxiliary cavity mode).We find that both E_(n)^((1))and E_(n)^((2))have maximum values in the case of reciprocal *** using nonreciprocal coupling,E_(n)^((1))and E_(n)^((2))can exceed those maximum values,and a wider detuning region where the entanglement exists can be ***,the entanglement robustness with respect to the environment temperature is also effectively enhanced.