2017/06/30 by Tan Li, Shuo Zhang, He-Liang Huang +4
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Excited state #Ground state #Laser cooling #Mechanical and Optical Resonators #Noise (video) #Quantum Information and Cryptography #Resolved sideband cooling #Resonator #Sideband #Upper and lower bounds #Work (physics) #quant-ph
paper · pdf · doi:10.1088/1361-6455/aaa2d9
21 pages, 7 figures. Comments Welcome!
openalex created_date 2017/06/15 · arxiv created 2017/12/19 · openalex publication_date 2017/12/19 · arxiv updated 2017/12/20 · openalex updated_date 2026/08/05
Abstract Cooling mechanical resonators are of great importance in both fundamental study and applied science. We investigate the hybrid optomechanical cooling with a three-level atomic ensemble fixed in a strong excited optical cavity. By using the quantum noise approach, we find the upper bound of the noise spectrum and further present three optimal parameter conditions, which can yield a small heating coefficient, a large cooling coefficient, and thus a small final phonon number. Moreover, through the covariance matrix approach, results of numerical simulation are obtained, which are consistent with the theoretical expectations. It is demonstrated that our scheme can achieve ground state cooling in the highly unresolved sideband regime, within the current experimental technologies. Compared with the previous cooling methods, in our scheme, there are fewer constraints on the drive strength of atomic ensemble and number of atoms in the ensemble. In addition, the tolerable ranges of parameters for ground state cooling are extended. As a result, our scheme is very suitable for experiments and can be a guideline for the research of hybrid optomechanical cooling.