Department of Physics, Huazhong University of Science and Technology, Wuhan 430074;
Centre for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071;
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074;
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074;
State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074;
State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074;