Single atoms transferring between a magneto-optical trap and a far-off-resonance optical dipole trap  

作　　者：何军 王婧 杨保东 张天才 王军民 

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices (Shanxi University),and Institute of Opto-Electronics,Shanxi University

出　　处：《Chinese Physics B》2009年第8期3404-3408,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos 60578018 and 10434080);the project for excellent research team from the National Natural Science Foundation of China (Grant No 60821004);the Program for New Century Excellent Talents of the Education Ministry of China (Grant No NCET-07-0524);the State Basic Key Research Program of China (Grant No 2006CB921102);the Specialized Research Fund for the Doctoral Program of Higher Education of China(Grant No 20070108003);the Natural Science Foundation of Shanxi Province,China (Grant No 2007011003);the Scientific Research Funds for Returned Scholars Abroad of Shanxi Province,China

摘　　要：Based on our work on single cesium atoms trapped in a large-magnetic-gradient vapour-cell magneto-optical trap （MOT）, the signal-to-noise ratio （SNR） is remarkably improved. Also a far-off-resonance optical dipole trap （FORT） formed by a strongly-focused 1064 nm single frequency Nd：YVO4 laser beam is introduced. One cesium atom is prepared in the MOT, and then it can transfer successfully between the MOT and the FORT which is overlapped with the MOT. Utilizing the effective transfer, the lifetime of single atoms trapped in the FORT is measured to be 6.9± 0.3 s. Thus we provide a system where the atomic qubit can be coherently manipulated.Based on our work on single cesium atoms trapped in a large-magnetic-gradient vapour-cell magneto-optical trap （MOT）, the signal-to-noise ratio （SNR） is remarkably improved. Also a far-off-resonance optical dipole trap （FORT） formed by a strongly-focused 1064 nm single frequency Nd：YVO4 laser beam is introduced. One cesium atom is prepared in the MOT, and then it can transfer successfully between the MOT and the FORT which is overlapped with the MOT. Utilizing the effective transfer, the lifetime of single atoms trapped in the FORT is measured to be 6.9± 0.3 s. Thus we provide a system where the atomic qubit can be coherently manipulated.

关 键 词：single atoms magneto-optical trap far-off-resonance optical dipole trap lifetime of single atoms 

分 类 号：O431.2[机械工程—光学工程] O562[理学—光学]