Electromagnetially-induced-transparency-like ground-state cooling in a double-cavity optomechanical system

TL;DR

This paper introduces an EIT-like cooling mechanism in a double-cavity optomechanical system that effectively cools a mechanical resonator close to its ground state, even without the resolved sideband condition.

Contribution

The study demonstrates a novel EIT-like cooling method in a double-cavity system that surpasses traditional limitations, enabling ground-state cooling without resolved sideband conditions.

Findings

Mechanical resonator can be cooled below the no-cavity limit.

Cooling effectiveness is maximized by optimal parameter tuning.

Ground-state cooling achievable without resolved sideband condition.

Abstract

We propose to cool a mechanical resonator close to its ground state via an electromagnetically-induced-transparency- (EIT-) like cooling mechanism in a double-cavity optomechanical system, where an additional cavity couples to the original one in the standard optomechanical system. By choosing optimal parameters such that the cooling process of the mechanical resonator corresponds to the maximum value of the optical fluctuation spectrum and the heating process to the minimum one, the mechanical resonator can be cooled with the final mean phonon number less than that at the absence of the additional cavity. And we show the mechanical resonator may be cooled close to its ground state via such an EIT-like cooling mechanism even when the original resolved sideband condition is not fulfilled at the absence of the additional cavity.