COHERENCE LENGTH OF NEUTRON SUPERFLUIDS

The coherence length of superfluid neutron matter is calculated from t he microscopic BCS wave function of a Cooper pair in momentum space ma king use of recent nucleon-nucleon potential models and including pola rization (RPA) effects. We find as our main result that the coherence length is proportional to the Fermi momentum to pairing gap ratio, in good agreement with simple estimates used in the literature, with a ne arly interaction independent constant of proportionality. Our calculat ions can be applied to the problem of inhomogenous superfluidity of ha dronic matter in the crust of a neutron star.