Superfluidity of Bose—Einstein condensates in ultracold atomic gases*
Zhu Qi-Zhonga), Wu Biaoa),b),c)†
       
Amplitudes (a1,b1,c1) and phase angles (a2,b2,c2) of the three component wave function ψ = ( ψ 1, ψ 0, ψ −1)T at the ground state of Hamiltonian ( 49 ) for a BEC of 23Na confined in a pancake trap. The particle number is 105, the radial frequency of the trap is 2 π × 55 Hz, and the dimensionless SOC strength is κ = 0.04. The confinement in the z direction is very tight with ω z = 2 π × 4200 Hz, so the system is effectively two-dimensional. Units of the X and Y axes are a h.