Induced p-wave superfluidity in two dimensions: Brane world in cold atoms and nonrelativistic defect CFTs

Understand

We propose to use a two-species Fermi gas with the interspecies s-wave Feshbach resonance to realize p-wave superfluidity in two dimensions.

• By confining one species of fermions in a two-dimensional plane immersed in the background three-dimensional Fermi sea of the other species, an attractive interaction is induced between two-dimensional fermions.
• We compute the pairing gap in the weak-coupling regime and show that it has the symmetry of p_x+ip_y.
• Because the magnitude of the pairing gap increases toward the unitarity limit, it is possible that the critical temperature for the p_x+ip_y-wave superfluidity becomes within experimental reach.