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

作　　者：Chun-Hua Wei Shu-Hua Yan 魏春华;颜树华(State Key Laboratory of Aerodynamics,China Aerodynamics Research and Development Center,Mianyang 621000,China;Low Speed Aerodynamics Institute,China Aerodynamics Research and Development Center,Mianyang 621000,China;Interdisciplinary Center for Quantum Information,National University of Defense Technology,Changsha 410073,China)

机构地区：[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

出　　处：《Chinese Physics B》2020年第6期202-206,共5页中国物理B（英文版）

基　　金：National Natural Science Foundation of China(Grant No.51275523)and the State Key Laboratory of Aerodynamics Research Fund,China(Grant No.SKLA2019040302).

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 every7.5 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 

分 类 号：O413.1[理学—理论物理]