Quantum estimation of rotational speed in optomechanics

作     者：李浩 程泂 Hao Li;Jiong Cheng

作者机构：Department of PhysicsNingbo UniversityNingbo 315211China 

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

年 卷 期：2023年第32卷第10期

页      面：377-382页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11704205 and 12074206) the National Natural Science Foundation of Zhejiang Province(Grant No.LY22A040005) K.C.Wong Magna Fund in Ningbo University 

主　　题：optomechanical system Fisher information 

摘      要：We study the quantum Fisher information(QFI)of the angular velocity of rotation in an optomechanical *** on the Gaussian measurements method,we derive the explicit form of a single-mode Gaussian QFI,which is valid for arbitrary angular velocity of *** information about the angular velocity to be measured is contained in the optical covariance matrix,which can be experimentally determined via homodyne *** find that QFI increases rapidly when driving the system close to the unstable *** result can be attributed to the strong nonlinearity of the system at the unstable *** results indicate the possibility of using an optomechanical system for high precision detection of the angular velocity of rotation.