Robbe Brants: Physical understanding of thermalization through mode structures

The way a relativistic system thermalizes can be understood through the signals that will contribute to its linear response to perturbations. What these signals are is captured in the analytic structure of the retarded correlation function. In this talk I will explain the different modes that may occur, how to interpret them and how to calculate their corresponding signal. I use kinetic theory in the (momentum dependent) relaxation time approximation to illustrate and improve intuition.