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Cavity Quantum Optomechanical Nonlinearities and Position Measurement beyond the Breakdown of the Linearized

J Clarke¹, P Neveu², K E Khosla¹

¹QOLS, Blackett Laboratory, Imperial College London, London SW7 2BW, United Kingdom.

Physical Review Letters

|August 18, 2023

Summary

Researchers developed a nonlinear framework for cavity quantum optomechanics to enable precise position measurements beyond linearized approximations. This advances quantum metrology and control in nonlinear optomechanical systems.

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Area of Science:

Quantum physics
Optomechanics

Background:

Optomechanics experiments are entering the nonlinear regime, where large interactions occur at low light levels.
Existing theoretical formalisms do not fully capture the nonlinearities of radiation-pressure interaction and cavity response.

Purpose of the Study:

To develop a nonlinear theoretical framework for cavity quantum optomechanics.
To propose a method for position measurement beyond the linearized approximation.

Main Methods:

Developed a nonlinear cavity quantum optomechanical framework.
Utilized optical general-dyne detection (single to dual homodyne).

Main Results:

Proposed a method for position measurement using imprinted mechanical information on optical quadratures.
The method supports both pulsed and continuous operation modes.

Conclusions:

The developed framework addresses the need for theoretical formalisms in nonlinear optomechanics.
Enables advances in quantum metrology, standard quantum limit exploration, and quantum measurement and control.