Speaker
Description
Strongly coupled confining models are promising Dark Matter candidates. They have the benefit of potentially producing detectable gravitational waves during a first order confinement phase transition. To estimate the resulting gravitational wave spectrum, phase transition parameters like the nucleation rate are needed. With the nonperturbative nature of these transitions, nucleation rate has so far been estimated with semi-classical methods.
We demonstrate that lattice methods can be used to estimate the nucleation rate in the case of strongly coupled confining transition. With four dimensional multicanonical simulations, we are able to calculate the critical bubble probability in SU(8) deconfinement transition, which gives an estimate for the rate. To fit the bubbles on the lattice, large volumes are required, and to accurately resolve the critical bubble configurations, improvements to the usual Polyakov loop order parameter are needed.