Creation of ^174Yb Bose-Einstein Condensates in a Crossed FORT  

作　　者：张梦娇 张曦 刘慧 熊转贤 吕宝龙 贺凌翔 

机构地区：[1]KeyLaboratoryofAtomicFrequencyStandards,WuhanInstituteofPhysicsandMathematics,ChineseAcademyofSciences,Wuhan430071 [2]UniversityofChineseAcademyofSciences,Beijing100049

出　　处：《Chinese Physics Letters》2014年第8期123-126,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 61227805, 11274349 and 11204353, and the National Basic Research Program of China under Grant No 2011CB921503.

摘　　要：Quantum degenerate gases of alkaline-earth-like atoms are unique systems used for quantum simulation, quantum computing and studies of quantum phase transitions. We report an all-optical formation of Bose Einstein eondensates of ytterbium atoms. About 106 atoms of ^174Yb are transferred to a far-off-resonance optical trap （FORT） and then cooled by evaporative cooling. Phase transition occurs at the critical temperature of 520 nK. A pure condensate containing approximately 2 × 10^4 atoms has been obtained in the crossed FORT, with an atomic peak density of -8 × 10^14 cm^-3. The condensate lifetime exceeds 1 s.Quantum degenerate gases of alkaline-earth-like atoms are unique systems used for quantum simulation, quantum computing and studies of quantum phase transitions. We report an all-optical formation of Bose Einstein eondensates of ytterbium atoms. About 106 atoms of ^174Yb are transferred to a far-off-resonance optical trap （FORT） and then cooled by evaporative cooling. Phase transition occurs at the critical temperature of 520 nK. A pure condensate containing approximately 2 × 10^4 atoms has been obtained in the crossed FORT, with an atomic peak density of -8 × 10^14 cm^-3. The condensate lifetime exceeds 1 s.

分 类 号：O4[理学—物理] TN911.22[电子电信—通信与信息系统]