Limiting effects of geometrical and optical nonlinearities on the squeezing in optomechanics

TL;DR

This paper investigates how geometrical and optical nonlinearities limit the generation of squeezed states in optomechanical systems, showing that minimizing these nonlinearities enhances quantum state preparation.

Contribution

It provides an analytical nonlinear model explaining the impact of geometrical and optical nonlinearities on squeezing, aligning with recent experimental results.

Findings

Highly squeezed states are achievable with minimized nonlinearities.

High nonlinearities hinder reaching the quantum ground state.

The model agrees well with experimental laser cooling data.

Abstract

In recent experiments, the re-thermalization time of the mechanical resonator is stated as the limiting factor for quantum applications of optomechanical systems. To explain the origin of this limitation, an analytical nonlinear investigation supported by the recent successful experimental laser cooling parameters is carried out in this work. To this end, the effects of geometrical and the optical nonlinearities on the squeezing are studied and are in a good agreement with the experimental results. It appears that highly squeezed state are generated where these nonlinearities are minimized and that high nonlinearities are limiting factors to reach the quantum ground state.