Squeezing of a nanomechanical oscillator

TL;DR

This paper demonstrates that injecting broadband squeezed vacuum and laser light into a cavity can generate significant momentum squeezing in a nanomechanical mirror, with over 70% squeezing achievable under optimal conditions.

Contribution

It introduces a method to produce large momentum squeezing in a nanomechanical oscillator using broadband squeezed vacuum light in the resolved sideband regime.

Findings

Over 70% momentum squeezing achieved

Decreasing temperature enhances squeezing

Higher laser power increases squeezing

Abstract

We show that squeezing of a nanomechanical mirror can be generated by injecting broad band squeezed vacuum light and laser light into the cavity. We work in the resolved sideband regime. We find that in order to obtain the maximum momentum squeezing of the movable mirror, the squeezing parameter of the input light should be about 1. We can obtain more than 70% squeezing. Besides, for a fixed squeezing parameter, decreasing the temperature of the environment or increasing the laser power increases the momentum squeezing. We find very large squeezing with respect to thermal fluctuations, for instance at 1 mK, the momentum fluctuations go down by a factor more than one hundred.