Dissipation-driven nonclassical state generation in optomechanics with squeezed light

TL;DR

This paper demonstrates how an optomechanical system driven by squeezed light can generate nonclassical, non-Gaussian mechanical states with quantum interference, useful for quantum measurements below the standard quantum limit.

Contribution

It introduces a method to produce nonclassical mechanical states via reservoir engineering in a quadratically coupled optomechanical system driven by squeezed light.

Findings

Mechanical oscillator evolves into an amplitude-squared squeezed vacuum state.

Steady state exhibits non-Gaussian Wigner distribution with quantum interference.

System enables quantum correlation measurements below the standard quantum limit.

Abstract

We study an optomechanical system for the purpose of generating a nonclassical mechanical state when a mechanical oscillator is quadratically coupled to a single-mode cavity field driven by a squeezed optical field. The system corresponds to a regime where the optical dissipation dominates both the mechanical damping and the optomechanical coupling. We identify that multi-phonon processes emerge in the optomechanical system and show that a mechanical oscillator prepared in the ground state will evolve into an amplitude-squared squeezed vacuum state. The Wigner distribution of the steady state of the mechanical oscillator is non-Gaussian exhibiting quantum interference and four-fold symmetry. This nonclassical mechanical state, generated via reservoir engineering, can be used for quantum correlation measurements of the position and momentum of the mechanics below the standard quantum limit.