Enhancing the Sensitivity of Quantum Optomechanical Gyroscope by Optical Kerr Effect
Ying Liu, Rui Zhang, Wen‐Quan Yang, Ya‐Feng Jiao, Wang‐Jun Lu, Qing‐Shou Tan, Le‐Man KuangABSTRACT
We propose a theoretical scheme to enhance the sensitivity of a quantum optomechanical gyroscope (QOMG) by the optical Kerr effect. We utilize quantum Fisher information (QFI) to assess the metrological potential of the QOMG scheme. It is found that the Kerr interaction can significantly enhances the sensitivity of the QOMG. We observe the super‐Heisenberg scaling of parameter estimation precision. Furthermore, we also evaluate the performance of the QOMG for the quadrature measurement. It is indicated that the sensitivity in the quadrature measurement scheme can saturate the quantum Cramér–Rao bound. We study the effect of the driving and dissipation of the optical cavity on the QFI, and find that the sensitivity can be manipulated by changing the driving, while dissipation decreases the sensitivity. The work shows that the photon nonlinear interaction is a valuable quantum resource to improve the sensitivity of the QOMG. These results could have a wide‐ranging impact on developing high‐performance QOMG in the future.