School of Physics & Astronomy, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom.
Phys Rev Lett. 2015 Aug 14;115(7):073004. doi: 10.1103/PhysRevLett.115.073004.
We report the 1D cooling of ^{85}Rb atoms using a velocity-dependent optical force based upon Ramsey matter-wave interferometry. Using stimulated Raman transitions between ground hyperfine states, 12 cycles of the interferometer sequence cool a freely moving atom cloud from 21 to 3 μK. This pulsed analog of continuous-wave Doppler cooling is effective at temperatures down to the recoil limit; with augmentation pulses to increase the interferometer area, it should cool more quickly than conventional methods and be more suitable for species that lack a closed radiative transition.
我们报告了使用基于拉姆齐物质波干涉的速度相关光力对^{85}Rb 原子进行一维冷却。通过在基态精细结构之间的受激拉曼跃迁，12 个干涉仪序列周期将自由移动的原子云从 21μK 冷却到 3μK。这种连续波多普勒冷却的脉冲模拟在低于反冲极限的温度下非常有效；通过增加干涉仪面积的增强脉冲，它应该比传统方法冷却得更快，并且更适合缺乏封闭辐射跃迁的物种。
