Noshad Khosravi-Largani

In this talk, I will present theoretical investigations of core-collapse supernovae and neutron stars, focusing on the role of a first-order hadron–quark matter phase transition at extreme densities. Using large-scale simulations based on general relativistic neutrino radiation hydrodynamics with Boltzmann neutrino transport, it is explored how such a phase transition can drive supernova explosions or alter the dynamics of accreting neutron stars. A distinctive secondary neutrino burst emerges as a potential signal of deconfined quark matter, giving insight into the dense matter equation of state. Additionally, universal relations for rapidly rotating hybrid stars are derived to reduce model dependencies. Finally, I will discuss a detailed frequency mode analysis of these systems, revealing the behavior of fundamental and gravity modes during the hydrodynamic evolution across the QCD phase transition.