On Axially- and Spherically-Symmetric Superfluidity in Coupled Fermion System

K. Kawamura
1974 Progress of theoretical physics  
The gap parameter in the axially symmetric superfluidity is shown to be written as In particular, an isotropic superfluid does not exist except l=O and 1. Assumption used are (i) a state with a single-valued l is realized, and (ii) for l is odd our system has the mirror-image-symmetry .
doi:10.1143/ptp.52.786 fatcat:jgahzd557fa4rf2gsoa4dq6idy