Spectrometric detection of weak forces in cavity optomechanics

Area of Science:

• Optomechanics
• Quantum Optics
• Precision Measurement

Background:

• Cavity optomechanical systems are sensitive to external forces.
• Detecting weak forces is crucial for fundamental physics and metrology.
• Thermal noise often limits the precision of force measurements.

Purpose of the Study:

• To propose a novel spectrometric method for detecting classical weak forces.
• To investigate the force-induced changes in cavity resonance frequency.
• To analyze the feasibility of using single-photon spectra for force inference.

Main Methods:

• Utilizing a cavity optomechanical system with a moving end mirror.
• Analyzing single-photon emission and scattering spectra.
• Modulating optomechanical coupling for oscillating force detection.

Main Results:

• The resonance frequency shift directly correlates with the applied force.
• Spectrometric analysis allows for force magnitude inference.
• The method demonstrates negligible influence from mechanical thermal noise.

Conclusions:

• The proposed spectrometric method offers a sensitive approach to detect classical weak forces.
• This technique overcomes limitations imposed by mechanical thermal noise.
• The method is extendable to detect oscillating forces.