Raman sideband cooling of rubidium atoms in optical lattice
Chun-Hua Wei(魏春华)1,2, Shu-Hua Yan(颜树华)1,2
1 College of Mechatronic Engineering and Automation, National University of Defense Technology, Changsha 410073, China;
2 Interdisciplinary Center for Quantum Information, National University of Defense Technology, Changsha 410073, China
We develop a simple and practical scheme to apply sideband cooling to a cloud of rubidium atoms. A sample containing 4×107087Rb is trapped in a far red detuned optical lattice. Through optimizing the relevant parameters, i.e., laser detuning, magnetic field, polarization, and duration time, a temperature around 1.5 μK and phase space density close to 1/500 are achieved. Compared with polarization gradient cooling, the temperature decreases by around one order of magnitude. This technique could be used in high precision measurement such as atomic clocks and atom interferometer. It could also serve as a precooling means before evaporation cooling in a dipole trap, and may be a promising method of achieving quantum degeneracy with purely optical means.
Project supported by the National Natural Science Foundation of China (Grant No. 51275523), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20134307110009), the Graduate Innovative Research Fund of Hunan Province, China (Grant No. CX20158015), and the Excellent Graduate Innovative Fund of National University of Defense Technology (NUDT) (Grant No. B150305).
Corresponding Authors:
Shu-Hua Yan
E-mail: yanshuhua996@163.com
About author: 0.1088/1674-1056/26/8/
Cite this article:
Chun-Hua Wei(魏春华), Shu-Hua Yan(颜树华) Raman sideband cooling of rubidium atoms in optical lattice 2017 Chin. Phys. B 26 080701
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