Raman sideband cooling of rubidium atoms in optical lattice  

作　　者：魏春华 颜树华 

机构地区：[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

出　　处：《Chinese Physics B》2017年第8期102-107,共6页中国物理B（英文版）

基　　金：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);the Excellent Graduate Innovative Fund of National University of Defense Technology(NUDT)(Grant No.B150305)

摘　　要：We develop a simple and practical scheme to apply sideband cooling to a cloud of rubidium atoms. A sample containing 4 × 10^（70） ^（87）Rb 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.We develop a simple and practical scheme to apply sideband cooling to a cloud of rubidium atoms. A sample containing 4 × 10^（70） ^（87）Rb 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.

关 键 词：atom cooling optical lattice sideband cooling 

分 类 号：O562[理学—原子与分子物理] TG501.5[理学—物理]