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Chin. Phys. B, 2020, Vol. 29(6): 064208    DOI: 10.1088/1674-1056/ab8625
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

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 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
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.
Keywords:  optical phase lock loop      laser cooling      Bose-Einstein condensates  
Received:  07 February 2020      Revised:  16 March 2020      Published:  05 June 2020
PACS:  42.50.-p (Quantum optics)  
  07.05.Fb (Design of experiments)  
Fund: 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).
Corresponding Authors:  Chun-Hua Wei     E-mail:  wch410204603@126.com

Cite this article: 

Chun-Hua Wei(魏春华), Shu-Hua Yan(颜树华) Simple and robust method for rapid cooling of 87Rb to quantum degeneracy 2020 Chin. Phys. B 29 064208

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