Early-Stage Shear Viscosity far from Equilibrium via Holography

4 Nov 2019, 17:40
20m
Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Poster Presentation New theoretical developments Poster Session

Speaker

Michael Florian Wondrak (Frankfurt Institute for Advanced Studies (FIAS))

Description

We study the far-from equilibrium shear viscosity as present in the early stage of a heavy-ion collision. Our investigation is based on applying the AdS/CFT correspondence to a time-dependent Vaidya spacetime. A generalization of the entropy density to the non-equilibrium regime is necessary for a consistent description. Throughout the evolution, we observe significant deviations in the shear viscosity over entropy density ratio, $\eta/s$, from the holographic bound in equilibrium, i.e. $1/4\pi$. This value is obtained asymptotically.

Primary author

Michael Florian Wondrak (Frankfurt Institute for Advanced Studies (FIAS))

Co-authors

Matthias Kaminski (University of Alabama, Tuscaloosa) Marcus Bleicher (Uni Frankfurt)

Presentation Materials