论文题目：Cooling of mechanical resonator in a double-cavity system with two-level atomic ensemble

论文类型：Article

第一作者：廖庆洪

通讯作者：廖庆洪

参与作者：Liao, QH (Liao, Qing-Hong) [1] , ; Dai, YZ (Dai, Yuan-Zhi) ; Nie, WJ (Nie, Wen-Jie) ; Liu, X (Liu, Xin) ; Liu, YC (Liu, Yong-Chun)

发表期刊名称：Journal of Physics B: Atomic, Molecular and Optical Physics

期刊分区（SCI为中科院分区）：JCR 2区

影响因子：1.917

发表日期：2020.4.28

卷、期、页：卷53 期8

ISSN号：0953-4075

关键字：MOTIONTRANSPARENCYOSCILLATOR

摘要：We propose a hybrid optomechanical system to achieve the ground state cooling of mechanical resonator by an electromagnetically-induced transparency (EIT)-like cooling mechanism. This system is composed of a mechanical resonator and two coupled single-mode cavities, and a two-level atomic ensemble simultaneously trapped in a standard optomechanical cavity. It is found that in the presence of a two-level atomic ensemble, the optical noise spectrum is split into an EIT-like spectrum. In particular, we investigate the effect of the atomic ensemble coupling strength on the EIT-like spectrum, indicating that the atomic ensemble coupling strength greatly increases the asymmetry of the EIT spectrum. Furthermore, we analyze the optimal conditions for achieving the maximum difference between cooling and heating processes in detail. In addition, we demonstrate that even in regions with unresolved sideband, the ground state cooling of mechanical resonator can be achieved by adjusting the coupling strength of the atomic ensemble. This research opens up the possibility for the application of cavity quantum optomechanics beyond the resolved sideband regime.