中国物理B ›› 2013, Vol. 22 ›› Issue (5): 56701-056701.doi: 10.1088/1674-1056/22/5/056701

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Production of 87Rb Bose-Einstein condensates in a hybrid trap

段亚凡, 姜伯楠, 孙剑芳, 刘亢亢, 徐震, 王育竹   

  1. Key Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 收稿日期:2012-10-08 修回日期:2012-11-28 出版日期:2013-04-01 发布日期:2013-04-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 10974211), the National Basic Research Program of China (Grant No. 2011CB921504), and the Research Project of Shanghai Science and Technology Commission, China (Grant No. 09DJ1400700).

Production of 87Rb Bose-Einstein condensates in a hybrid trap

Duan Ya-Fan (段亚凡), Jiang Bo-Nan (姜伯楠), Sun Jian-Fang (孙剑芳), Liu Kang-Kang (刘亢亢), Xu Zhen (徐震), Wang Yu-Zhu (王育竹)   

  1. Key Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2012-10-08 Revised:2012-11-28 Online:2013-04-01 Published:2013-04-01
  • Contact: Wang Yu-Zhu E-mail:yzwang@mail.shcnc.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 10974211), the National Basic Research Program of China (Grant No. 2011CB921504), and the Research Project of Shanghai Science and Technology Commission, China (Grant No. 09DJ1400700).

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摘要： We report a rapid evaporative cooling method using a hybrid trap which is composed of a quadrupole magnetic trap and a one-beam optical dipole trap. It contains two kinds of evaporative coolings to reach the quantum degeneracy: previously radio-frequency (RF) enforced evaporative cooling in the quadrupole magnetic trap and further runaway evaporative cooling in the optical dipole trap. The hybrid trap does not require a very high power laser such as that in the traditional pure optical trap, but still has a deep trap depth and a large trap volume, and has better optical access than the normal magnetic trap like the quadrupole-Ioffe-configuration (QUIC) cloverleaf trap. A high trap frequency can be easily realized in the hybrid trap to enhance the elastic collision rate and shorten the evaporative cooling time. In our experiment, pure Bose-Einstein condensates (BECs) with about 1×10^5 atoms can be realized in 6 s evaporative cooling in the optical dipole trap.

关键词: ultra-cold atoms, Bose-Einstein condensates, optical dipole trap, hybrid trap

Abstract: We report a rapid evaporative cooling method using a hybrid trap which is composed of a quadrupole magnetic trap and a one-beam optical dipole trap. It contains two kinds of evaporative coolings to reach the quantum degeneracy: previously radio-frequency (RF) enforced evaporative cooling in the quadrupole magnetic trap and further runaway evaporative cooling in the optical dipole trap. The hybrid trap does not require a very high power laser such as that in the traditional pure optical trap, but still has a deep trap depth and a large trap volume, and has better optical access than the normal magnetic trap like the quadrupole-Ioffe-configuration (QUIC) cloverleaf trap. A high trap frequency can be easily realized in the hybrid trap to enhance the elastic collision rate and shorten the evaporative cooling time. In our experiment, pure Bose-Einstein condensates (BECs) with about 1×10^5 atoms can be realized in 6 s evaporative cooling in the optical dipole trap.

Key words: ultra-cold atoms, Bose-Einstein condensates, optical dipole trap, hybrid trap

中图分类号:  (Bose-Einstein condensates in optical potentials)

  • 67.85.Hj
37.10.Jk (Atoms in optical lattices)