Superfluid properties of dilute neutron matter

Abstract

We report results of fully non-perturbative calculations, based on Auxiliary Field Quantum Monte Carlo (AFQMC) approach, for the dilute neutron matter at the density $\rho=0.003\fm^{-3}$. Fundamental quantities which characterize the superfluid state: the single particle energy gap $\Delta(T)$, and the critical temperature $\Tc$ have been determined. The large value of $\Delta(0)/\Tc\approx 3.2$ indicates that the system is not a BCS-type superfluid at low temperatures.