Possibility of an Optically-Trapped Bose-Einstein Condensation
YIN Jian-ping1,2,3, Yifu Zhu2, WANG Yu-zhu3,Min Xiao4
1Department of Physics, Suzhou University, Suzhou, 215006
Department of Physics, Florida International University Miami, Florida 33199, USA
3Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
4Department of Physics, University of Arkansas, Fayetteville, AR 72701,USA
Possibility of an Optically-Trapped Bose-Einstein Condensation
1Department of Physics, Suzhou University, Suzhou, 215006
Department of Physics, Florida International University Miami, Florida 33199, USA
3Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
4Department of Physics, University of Arkansas, Fayetteville, AR 72701,USA
Abstract： We propose a novel gravito-optical atom trap composed of a blue-detuned, conical dark-hollow-beam propagating upward and the gravity field. When cold atoms are loaded into the conical dark-hollow-beam from a magnetic-optical trap and bounce inside the hollow beam, they experience an efficient hollow-beam induced Sisyphus cooling and repurnping-beam induced geometric cooling. Our investigation shows that an ultracold and dense 87Rb atomic sample with an equilibrium 3D temperature of about 1μK can be obtained and the appearance of an optically-trapped Bose-Einstein condensation may be possible in this pure optical trap.
1999, Vol. 16 
