Hosseini Mahdi, Duan Yiheng, Beck Kristin M, Chen Yu-Ting, Vuletić Vladan
Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
Phys Rev Lett. 2017 May 5;118(18):183601. doi: 10.1103/PhysRevLett.118.183601. Epub 2017 May 1.
We demonstrate cavity cooling of all motional degrees of freedom of an atomic ensemble using light that is far detuned from the atomic transitions by several gigahertz. The cooling is achieved by cavity-induced frequency-dependent asymmetric enhancement of the atomic emission spectrum, thereby extracting thermal kinetic energy from the atomic system. Within 100 ms, the atomic temperature is reduced from 200 to 10 μK, where the final temperature is mainly limited by the linewidth of the cavity. In principle, the technique can be applied to molecules and atoms with complex internal energy structure.
我们展示了利用与原子跃迁失谐数吉赫兹的光来对原子系综的所有运动自由度进行腔冷却。这种冷却是通过腔诱导的原子发射光谱的频率依赖不对称增强来实现的，从而从原子系统中提取热动能。在100毫秒内，原子温度从200微开尔文降至10微开尔文，其中最终温度主要受腔线宽限制。原则上，该技术可应用于具有复杂内能结构的分子和原子。
