Thermalization and Hydrodynamics in 2d QFTs

Abstract: I will discuss the finite-temperature behavior of general 2d QFTs (obtained as relevant deformations of CFTs). At long timescales (t >> 1/T), these theories all have an effective hydrodynamic description governed by the KPZ universality class. Using KPZ universality and causality, I will derive a lower bound on the timescale characterizing the onset of this hydrodynamic behavior. The resulting bound is typically much longer than the expected quantum equilibration time of 1/T. I will also show how causality can be used to define a new thermodynamic C-function for 2d QFTs, as well as constrain the sign of the "T-Tbar" term in EFTs.

general relativity and quantum cosmologyHEP - phenomenologyHEP - theorymathematical physicsquantum physics

Audience: researchers in the topic

HEP seminars TU Wien (Vienna)

Series comments: ID number: 954 8284 9369