中国物理B ›› 2020, Vol. 29 ›› Issue (6): 64208-064208.doi: 10.1088/1674-1056/ab8625

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Simple and robust method for rapid cooling of 87Rb to quantum degeneracy

Chun-Hua Wei(魏春华), Shu-Hua Yan(颜树华)   

  1. 1 State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang 621000, China;
    2 Low Speed Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China;
    3 Interdisciplinary Center for Quantum Information, National University of Defense Technology, Changsha 410073, China
  • 收稿日期:2020-02-07 修回日期:2020-03-16 出版日期:2020-06-05 发布日期:2020-06-05
  • 通讯作者: Chun-Hua Wei E-mail:wch410204603@126.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 51275523) and the State Key Laboratory of Aerodynamics Research Fund, China (Grant No. SKLA2019040302).

Simple and robust method for rapid cooling of 87Rb to quantum degeneracy

Chun-Hua Wei(魏春华)1,2, Shu-Hua Yan(颜树华)3   

  1. 1 State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang 621000, China;
    2 Low Speed Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China;
    3 Interdisciplinary Center for Quantum Information, National University of Defense Technology, Changsha 410073, China
  • Received:2020-02-07 Revised:2020-03-16 Online:2020-06-05 Published:2020-06-05
  • Contact: Chun-Hua Wei E-mail:wch410204603@126.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 51275523) and the State Key Laboratory of Aerodynamics Research Fund, China (Grant No. SKLA2019040302).

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摘要： We demonstrate a simple and fast way to produce 87Rb Bose-Einstein condensates. A digital optical phase lock loop (OPLL) board is introduced to lock and adjust the frequency of the trap laser, which simplifies the optical design and improves the experimental efficiency. We collect atoms in a magneto-optical trap, then compress the cloud and cut off hot atoms by rf knife in a magnetic quadrupole trap. The atom clouds are then transferred into a spatially mode-matched optical dipole trap by lowering the quadrupole field gradient. Our system reliably produces a condensate with 2×106 atoms every 7.5 s. The compact optical design and rapid preparation speed of our system will open the gate for mobile quantum sensing.

关键词: optical phase lock loop, laser cooling, Bose-Einstein condensates

Abstract: We demonstrate a simple and fast way to produce 87Rb Bose-Einstein condensates. A digital optical phase lock loop (OPLL) board is introduced to lock and adjust the frequency of the trap laser, which simplifies the optical design and improves the experimental efficiency. We collect atoms in a magneto-optical trap, then compress the cloud and cut off hot atoms by rf knife in a magnetic quadrupole trap. The atom clouds are then transferred into a spatially mode-matched optical dipole trap by lowering the quadrupole field gradient. Our system reliably produces a condensate with 2×106 atoms every 7.5 s. The compact optical design and rapid preparation speed of our system will open the gate for mobile quantum sensing.

Key words: optical phase lock loop, laser cooling, Bose-Einstein condensates

中图分类号:  (Quantum optics)

  • 42.50.-p
07.05.Fb (Design of experiments)