Speaker
Description
We perform a detailed holographic analysis of linear fluctuations in a strongly coupled plasma subject to a first-order phase transition. This analysis is done through the characterization of the energy-momentum tensor correlation functions across the phase diagram. Particular attention is given to the behavior of modes near the spinodal region of the phase transition, where the instability under sound modes amplifies scalar excitations. This set of fluctuations seeds the emission of gravitation waves in strongly coupled plasmas via different mechanisms: thermal emission and emission associated to phase transitions in the spinodal regime. These results illustrate how fluctuation dynamics and correlation functions encode information about both equilibrium and non-equilibrium gravitational-wave sources in strongly coupled systems.