Study On Quantum Properties And Quantum Sensing In The Hybrid System Of Optomechanics

Solid quantum systems have the advantages of large coupling strength,strong nonlinearity and flexible design,which greatly promote the hybridization of various quantum systems.In hybrid quantum systems,various quantum systems can be combined by heterogeneous physical systems to realize new functions and study physical phenomena by using their respective advantages.This paper mainly studies the hybrid cavity optical force system composed of microwave cavity field,qubit,micromechanical resonator and optical cavity field.Pump-probe technique is used to study nonlinear optical phenomena and applications in hybrid cavity optomechanics systems,such as optomechanically induced transparency,four-wave mixing,mass sensing,non-linear Kerr switch,etc.Different from the standard cavity optomechanics system,this article combines the easy integration of superconducting circuits and has the advantages of good scalability,and proposes the following two hybrid cavity optomechanical system schemes:Firstly,the quality sensing scheme of mechanical oscillator coupling standard circuit quantum electrodynamics system is proposed.Next,the electromagnetic induced transparency phenomenon is studied according to the absorption spectrum.The effects of external control parameters such as the coupling strength between the qubit and the mechanical oscillator and the microwave cavity,the detuning of the qubit and the cavity field,the cavity pumping strength,and the attenuation rate of the cavity and the qubit on the optical propagation characteristics of the hybrid system are discussed.Additionally,the electromagnetic induced transparency in the composite system shows that the position of the peak in the absorption spectrum corresponds to the value of the mechanical oscillator frequency,so a nonlinear optical method for measuring the oscillator frequency is given.Based on this,a quality sensing scheme is proposed.Secondly,the controllable response of an optomechanical hybrid system is investigated.The system consists of a microwave cavity,a mechanical vibrator and two optical cavities,and the mechanical vibrator is coupled to an optical cavity and a microwave cavity at the same time.The influence of the auxiliary optical cavity on the transmission spectrum and the four-wave mixing spectrum of the hybrid system is studied.Firstly,the variation of coupling intensity between two optical cavities can lead to light force induced absorption and amplification when the microwave cavity is driven to the red edge band and the optical cavity is driven to the blue edge band according to the system transmission spectrum.The coupling strength between optical cavities can be used as a regulating switch between optical force induced transparency and parametric amplification.Secondly,the controllable response of the auxiliary optical cavity to the composite system is studied,and the resonance frequency of the mechanical oscillator can be measured by the four-wave mixing spectrum of the detection field because of the quantum interference effect between the mechanical mode and the two optical fields.