Spontaneous mass current and textures of p-wave superfluids of trapped fermionic atom gases at rest and under rotation

摘要

Based on the Ginzburg-Landau framework, we find that p-wave superfluids of neutral atom gases in threedimensional harmonic traps exhibit spontaneous mass current at rest with direction dependent on trap geometry. Under rotation, various types of order parameter textures are stabilized including Mermin-Ho and Anderson-Toulouse-Chechetkin vortices. In a cigar shape trap, spontaneous current flows parallel to the rotation axis and thus perpendicular to the ordinary rotational current. The spontaneous mass current at rest and texture formation can be used to investigate p-wave superfluidity.