Superfluid to Mott-insulator transition in a one-dimensional optical lattice  

作　　者：Wenliang Liu Ningxuan Zheng Jun Jian Li Tian Jizhou Wu Yuqing Li Yongming Fu Peng Li Vladimir Sovkov Jie Ma Liantuan Xiao Suotang Jia 刘文良;郑宁宣;蹇君;田丽;武寄洲;李玉清;付永明;李鹏;Vladimir Sovkov;马杰;肖连团;贾锁堂(State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University,Taiyuan 030006,China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China;School of Science,Key Laboratory of High Performance Scientific Computation,Xihua University,Chengdu 610039,China;St.Petersburg State University,7/9 Universitetskaya nab.,St.Petersburg 199034,Russia)

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University,Taiyuan 030006,China [2]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China [3]School of Science,Key Laboratory of High Performance Scientific Computation,Xihua University,Chengdu 610039,China [4]St.Petersburg State University,7/9 Universitetskaya nab.,St.Petersburg 199034,Russia

出　　处：《Chinese Physics B》2022年第7期268-271,共4页中国物理B（英文版）

基　　金：the National Key Research and Development Program of China(Grant No.2017YFA0304203);the National Natural Science Foundation of China(Grant Nos.62020106014,62175140,61901249,92165106,and 12104276);PCSIRT(Grant No.IRT-17R70);the 111 Project(Grant No.D18001);the Applied Basic Research Project of Shanxi Province,China(Grant Nos.201901D211191 and 201901D211188);the Shanxi 1331 KSC,and the Collaborative Grant by the Russian Foundation for Basic Research and NNSF of China(Grant No.62011530047 and Grant No.2053-53025 in the RFBR Classifcation)。

摘　　要：Bose–Einstein condensates(BEC)of sodium atoms are transferred into one-dimensional(1D)optical lattice potentials,formed by two laser beams with a wavelength of 1064 nm,in a shallow optical trap.The phase coherence of the condensate in the lattice potential is studied by changing the lattice depth.A qualitative change in behavior of the BEC is observed at a lattice depth of~13.7Er,where the quantum gas undergoes a transition from a superfluid state to a state that lacks well-to-well phase coherence.

关 键 词：Bose–Einstein condensate optical lattice SUPERFLUID Mott-insulator phase 

分 类 号：O469[理学—凝聚态物理]