Evaporative cooling of ^(87)Rb atoms into Bose-Einstein condensate in an optical dipole trap  

作　　者：熊德智 王鹏军 付正砷 柴世杰 张靖 

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University

出　　处：《Chinese Optics Letters》2010年第7期627-629,共3页中国光学快报（英文版）

基　　金：supported in part by the National Natural Science Foundation of China for Distinguished Young Scholars (No. 10725416);the National Basic Research Program of China (No. 2006CB921101);the National Natural Science Foundation of China Project for Excellent Research Team (No. 60821004);the National Natural Science Foundation of China (No. 60678029);the Program for the Top Young and Middle-Aged Innovative Talents of Higher Learning Institutions of Shanxi

摘　　要：We create a Bose-Einstein condensate （BEC） of 87Rb atoms by runaway evaporative cooling in an optical trap. Two crossed infrared laser beams with a wavelength of 1064 nm are used to form an optical dipole trap. After precooling the atom samples in a quadrupole-Ioffe configuration （QUIC） trap under 1.5 #K by radio-frequency （RF） evaporative cooling, the samples are transferred into the center of the glass cell, then loaded into the optical dipole trap with 800 ms. The pure condensate with up to 1.5× 10^5 atoms is obtained over 1.17 s by lowering the power of the trap beams.We create a Bose-Einstein condensate （BEC） of 87Rb atoms by runaway evaporative cooling in an optical trap. Two crossed infrared laser beams with a wavelength of 1064 nm are used to form an optical dipole trap. After precooling the atom samples in a quadrupole-Ioffe configuration （QUIC） trap under 1.5 #K by radio-frequency （RF） evaporative cooling, the samples are transferred into the center of the glass cell, then loaded into the optical dipole trap with 800 ms. The pure condensate with up to 1.5× 10^5 atoms is obtained over 1.17 s by lowering the power of the trap beams.

关 键 词：Cooling EVAPORATION Evaporative cooling systems Infrared lasers RUBIDIUM Statistical mechanics Steam condensers 

分 类 号：O562.3[理学—原子与分子物理]