Optomechanical Force Sensor in non-Markovian Regime

TL;DR

This paper demonstrates that non-Markovian environments can enhance optomechanical force sensors by reducing noise and improving sensitivity without additional complex systems, offering a promising approach for ultrasensitive detection.

Contribution

It introduces a method to utilize non-Markovian reservoirs in optomechanical sensors to lower noise levels and improve detection sensitivity without auxiliary systems.

Findings

Weak force detection sensitivity is improved in non-Markovian environments.

Additional noise can be significantly reduced compared to Markovian cases.

Optimal low-level noise is achievable without squeezing or auxiliary systems.

Abstract

The optomechanical force sensor in non-Markovian environment for a mechanical oscillator is presented. By performing homodyne detection we obtain an generally expression for the output signal. It is shown that the weak force detection is sensitive to the non-Markovian environment. The additional noise can be obviously reduced comparing to the Markovian condition. Moreover, the optimal additional noise can be maintained in a rather low level without using assistant system or squeezing under available experimental condition in unsolved sideband regime. Our results provides a promising platform for reducing the additional noise by using engineered non-Markovian reservoir in ultrasensitive detection.