Single atoms transferring between a magneto-optical trap and a far-off-resonance optical dipole trap
He Jun(何军), Wang Jing(王婧), Yang Bao-Dong(杨保东), Zhang Tian-Cai(张天才), and Wang Jun-Min(王军民)†
State Key Laboratory of Quantum Optics and Quantum Optics Devices (Shanxi University), and Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China
Abstract 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.
Received: 17 October 2008
Revised: 19 November 2008
Accepted manuscript online:
PACS:
37.10.De
(Atom cooling methods)
Fund: Project partially
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), and the
Scientific Research Funds for Returned Scholars
Abroad of Shanxi Province, China.
Cite this article:
He Jun(何军), Wang Jing(王婧), Yang Bao-Dong(杨保东), Zhang Tian-Cai(张天才), and Wang Jun-Min(王军民) Single atoms transferring between a magneto-optical trap and a far-off-resonance optical dipole trap 2009 Chin. Phys. B 18 3404
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