Quantum Noise Interference and Back-action Cooling in Cavity Nanomechanics

TL;DR

This paper introduces a theoretical scheme where quantum noise interference enables ground-state cooling of a mechanical resonator in a cavity system without the need for the good cavity limit, broadening the conditions for quantum control.

Contribution

It proposes a novel cavity electromechanical setup leveraging quantum noise interference to achieve effective zero-temperature baths for cooling.

Findings

Quantum noise interference enables effective zero-temperature bath.

Ground-state cooling without the good cavity limit.

The scheme is robust across different cavity damping regimes.

Abstract

We present a theoretical analysis of a novel cavity electromechanical system where a mechanical resonator directly modulates the damping rate kappa of a driven electromagnetic cavity. We show that via a destructive interference of quantum noise, the driven cavity can effectively act like a zero-temperature bath irrespective of the ratio kappa / omega_M, where omega_M is the mechanical frequency. This scheme thus allows one to cool the mechanical resonator to its ground state without requiring the cavity to be in the so-called `good cavity' limit kappa << omega_M.