Generation of mechanical squeezing via magnetic dipoles on cantilevers

TL;DR

This paper proposes a theoretical scheme to generate quantum squeezing of a mechanical oscillator's motion using magnetic dipole interactions, analyzing noise effects and detection methods.

Contribution

It introduces a novel approach to mechanically squeeze a quantum oscillator via magnetic dipole coupling and assesses noise impacts and detection strategies.

Findings

Squeezing below the standard quantum limit is theoretically achievable.

Noise sources like classical and clamping noise affect squeezing performance.

Detection via state transfer to light is feasible but has limitations.

Abstract

A scheme to squeeze the center-of-mass motional quadratures of a quantum mechanical oscillator below its standard quantum limit is proposed and analyzed theoretically. It relies on the dipole-dipole coupling between a magnetic dipole mounted on the tip of a cantilever to equally oriented dipoles located on a mesoscopic tuning fork. We also investigate the influence of several sources of noise on the achievable squeezing, including classical noise in the driving fork and the clamping noise in the oscillator. A detection of the state of the cantilever based on state transfer to a light field is considered. We investigate possible limitations of that scheme.