[Back]

K. Boguslavski:
"Excitation spectra of scalar and gluonic systems far from equilibrium";
Talk: Friday seminar, Atominstitut (invited); 2021-03-26.

Motivated by ultra-cold atom experiments and high-energy heavy-ion collisions,
there has been a great effort in recent years to study scalar and gluonic systems far
from equilibrium. Spectral functions extracted in classical-statistical lattice
simulations have become a powerful tool in their analysis, and allow to identify the
relevant dynamical processes nonperturbatively. In this talk, I will present results
for scalar and gluonic systems. For scalar O(N) theories, we obtain a new
classification of far-from-equilibrium universality classes. In gluonic plasmas, we
find narrow quasiparticle peaks in 3+1 dimensions, while the structure of
excitations in 2+1 dimensions is nontrivial and nonperturbative.