Hybrid optomechanical cooling by atomic $\Lambda$ systems

TL;DR

This paper explores a hybrid quantum system combining cavity optomechanics and ultracold gases, showing significant enhancement in cooling efficiency and potential for ground state cooling at room temperature.

Contribution

It introduces a novel hybrid scheme where ultracold gases modify optomechanical responses, enabling enhanced cooling and quantum control of mechanical resonators.

Findings

Over two orders of magnitude enhancement in optomechanical cooling.

Regimes identified for ground state cooling from room temperature.

Hybrid system serves as an interface for quantum state manipulation.

Abstract

We investigate a hybrid quantum system consisting of a cavity optomechanical device optically coupled to an ultracold quantum gas. We show that the dispersive properties of the ultracold gas can be used to dramatically modify the optomechanical response of the mechanical resonator. We examine hybrid schemes wherein the mechanical resonator is coupled either to the motional or the spin degrees of freedom of the ultracold gas. In either case, we find an enhancement of more than two orders of magnitude in optomechanical cooling due to this hybrid interaction. Significantly, based on demonstrated parameters for the cavity optomechanical device, we identify regimes that enable the ground state cooling of the resonator from room temperature. In addition, the hybrid system considered here represents a powerful interface for the use of an ultracold quantum gas for state preparation, sensing and quantum manipulation of a mesoscopic mechanical resonator.