  Core collapse supernova simulations can be sensitive to neutrino interactions
near the neutrinosphere. This is the surface of last scattering. We model the
neutrinosphere region as a warm unitary gas of neutrons. A unitary gas is a low
density system of particles with large scattering lengths. We calculate
modifications to neutrino scattering cross sections because of the universal
spin and density correlations of a unitary gas. These correlations can be
studied in laboratory cold atom experiments. We find significant reductions in
cross sections, compared to free space interactions, even at relatively low
densities. These reductions could reduce the delay time from core bounce to
successful explosion in multidimensional supernova simulations.
