[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, Natl Time Serv Ctr, Key Lab Time & Frequency Primary Stand, Xian 710600, Peoples R China
[4] Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
[5] Fujian Normal Univ, Coll Phys & Energy, Fujian Prov Key Lab Quantum Manipulat & New Energ, Fuzhou 350117, Peoples R China
[6] Fujian Prov Collaborat Innovat Ctr Optoelect Semi, Xiamen 361005, Peoples R China
[7] Mississippi State Univ, Dept Phys & Astron, Starkville, MS 39762 USA
[8] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA
[9] Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China