Speaker
Robbe Brants
(Ghent University)
Description
Relativistic hydrodynamics successfully provides an effective field theory description for the low energy regime of many out-of-equilibrium systems. On the other hand, we proved that any stand-alone hydrodynamic EFT is inherently acausal and therefore requires the addition of transient UV modes in order to restore causality. This is made possible by the exponential decay of dissipative hydrodynamics in a majority of the lightcone, allowing the possibility of a causal description that still reduces to the hydrodynamic one at late timescales. It furthermore allows learning about the emergence and possible restrictions of the non-hydrodynamic modes in these causal UV completions.
Author
Robbe Brants
(Ghent University)