Auxiliary-cavity-enhanced quantum estimation of optorotational-coupling strength

Area of Science:

• Quantum optics
• Quantum sensing
• Optomechanics

Background:

• Optorotational-coupling (ORC) describes the interaction between light's orbital angular momentum and mechanical rotation.
• Accurate estimation of ORC strength is crucial for developing sensitive quantum measurement devices.
• Existing methods face limitations in precision and robustness against environmental noise.

Purpose of the Study:

• To propose and theoretically investigate a novel scheme for enhanced quantum estimation of ORC strength.
• To improve the precision and robustness of quantum sensing for ORC parameters.
• To explore the potential of coupled cavity systems in quantum metrology.

Main Methods:

• Coupling a driven auxiliary cavity to a rotational cavity containing Laguerre-Gaussian (L-G) light.
• Analyzing the quantum estimation of ORC strength using the proposed coupled system.
• Investigating the impact of thermal noise and dissipation on estimation precision.

Main Results:

• The proposed scheme significantly reduces the estimation error of the ORC parameter.
• The enhanced precision demonstrates superior robustness against thermal noise and dissipation compared to unassisted methods.
• The auxiliary-cavity design is key to achieving these improved sensing capabilities.

Conclusions:

• The developed scheme offers a pathway to significantly enhanced quantum estimation of ORC strength.
• This work provides a foundation for developing next-generation high-precision quantum sensors.
• The findings highlight the utility of coupled optical cavities in advancing quantum metrology.