StateKeyLaboratoryofMagneticResonanceandAtomicandMolecularPhysics;
WuhanInstituteofPhysicsandMathematics;
theChineseAcademyofSciences;
Wuhan430071;
China;
DepartmentofPhysics;
HunanInstituteofHumanityandScienceandTechnology;
Loudi417000;
China;
CenterforColdAtomPhysics;
theChineseAcademyofScience;
Wuhan430071;
China;