中国物理B ›› 2013, Vol. 22 ›› Issue (2): 23702-023702.doi: 10.1088/1674-1056/22/2/023702

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Optimal transport of cold atoms by modulating the velocity of traps

韩景珊, 许忻平, 张海潮, 王育竹   

  1. Key Laboratory for Quantum Optics, Center for Cold Atom Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 收稿日期:2012-06-15 修回日期:2012-07-30 出版日期:2013-01-01 发布日期:2013-01-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 10974210) and the National Basic Research Program of China (Grant No. 2011CB921504).

Optimal transport of cold atoms by modulating the velocity of traps

Han Jing-Shan (韩景珊), Xu Xin-Ping (许忻平), Zhang Hai-Chao (张海潮), Wang Yu-Zhu (王育竹)   

  1. Key Laboratory for Quantum Optics, Center for Cold Atom Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2012-06-15 Revised:2012-07-30 Online:2013-01-01 Published:2013-01-01
  • Contact: Zhang Hai-Chao, Wang Yu-Zhu E-mail:zhanghc@siom.ac.cn; yzwang@mail.shcnc.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 10974210) and the National Basic Research Program of China (Grant No. 2011CB921504).

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摘要： This work experimentally demonstrates a new method of optimizing the transport of cold atoms via modulating the velocity profile imposed on a magnetic quadrupole trap. The trap velocity and corresponding modulation are controlled by varying the currents of two pairs of anti-Helmholtz coils. Cold 87Rb atoms are transported in a non-adiabatic regime over 22 mm in 200 ms. For the transported atoms their final-vibration amplitude dependences of modulation period number, depth, and initial phase are investigated. With modulation period n=5, modulation depth K=0.55, and initial phase φ=0, cold atom clouds with more atom numbers, smaller final-vibration amplitude, and lower temperature are efficiently transported. Theoretical analysis and numerical simulation are also provided, which are in good agreement with experimental results.

关键词: transport of cold atoms, modulation, velocity profile

Abstract: This work experimentally demonstrates a new method of optimizing the transport of cold atoms via modulating the velocity profile imposed on a magnetic quadrupole trap. The trap velocity and corresponding modulation are controlled by varying the currents of two pairs of anti-Helmholtz coils. Cold 87Rb atoms are transported in a non-adiabatic regime over 22 mm in 200 ms. For the transported atoms their final-vibration amplitude dependences of modulation period number, depth, and initial phase are investigated. With modulation period n=5, modulation depth K=0.55, and initial phase φ=0, cold atom clouds with more atom numbers, smaller final-vibration amplitude, and lower temperature are efficiently transported. Theoretical analysis and numerical simulation are also provided, which are in good agreement with experimental results.

Key words: transport of cold atoms, modulation, velocity profile

中图分类号:  (Mechanical effects of light on atoms, molecules, and ions)

  • 37.10.Vz
37.10.Gh (Atom traps and guides) 37.90.+j (Other topics in mechanical control of atoms, molecules, and ions)