Self-Maintained Coherent Oscillations in Dense Neutrino Gases

Abstract

We present analytical solutions to the nonlinear equations describing the behavior of a gas of neutrinos with two flavors. Self-maintained coherent flavor oscillations are shown to occur when the gas density exceeds a critical value determined by the neutrino masses and the mean neutrino energy in the gas. Similar oscillations may have occurred in the early Universe.

Comments: To appear in Physical Review D, July 1995