Solar, Supernova, and Galactic Neutrinos

The flavor transformation of neutrinos through quantum mechanics drives the explosion of a massive star and governs the composition of elements created in its ejected matter. These interacting systems permit neutrino dynamics due to many-body quantum correlations that develop oscillations on fast timescales associated with entanglement entropy. While the mean-field approximation efficiently models neutrino quantum mechanics, its accuracy to represent flavor changes remains unclear in a precise many-body treatment. To address this, we conduct many-body simulations of neutrino quantum kinetics, focusing on supernova instabilities. This research connects mean-field and many-body models to develop a comprehensive framework for kinetic theory, addressing instabilities in entangled environments. The results could fill gaps in the quantum kinetic theory of how neutrinos drive supernovae and the generation of heavy elements in the universe.