Improving optomechanical gyroscopes by coherent quantum noise cancellation processing  

作　　者：Kai Li Sankar Davuluri Yong Li 

机构地区：[1]Beijing Computational Science Research Center, Beijing 100193, China [2]Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha 410081, China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2018年第9期19-25,共7页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Key R&D Program of China(Grant No.2016YFA0301200);the National Basic Research Program of China(Grant No.2014CB921403);the Science Challenge Project(Grant No.TZ2018003);the National Natural Science Foundation of China(Grants Nos.11774024,11534002,and U1530401)

摘　　要：Coherent quantum noise cancellation(CQNC) method is used to beat standard quantum limit(SQL) for improving the performance of quantum optomechanical gyroscopes. The protocol for realizing CQNC is achieved by constructing an effective negative mass mechanical oscillator, which is simulated by an ancillary cavity. This oscillator shows an antiresponse relative to that of a real mechanical oscillator. Thus, the optomechanical back-action noise is counteracted or restrained, and we could increase our signal by increasing the coupling strength without increasing the noise.Coherent quantum noise cancellation（CQNC） method is used to beat standard quantum limit（SQL） for improving the performance of quantum optomechanical gyroscopes. The protocol for realizing CQNC is achieved by constructing an effective negative mass mechanical oscillator, which is simulated by an ancillary cavity. This oscillator shows an antiresponse relative to that of a real mechanical oscillator. Thus, the optomechanical back-action noise is counteracted or restrained, and we could increase our signal by increasing the coupling strength without increasing the noise.

关 键 词：CQNC OPTOMECHANICS GYROSCOPE 

分 类 号：TN96[电子电信—信号与信息处理]