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.
Author
Michael Florian Wondrak
(Frankfurt Institute for Advanced Studies (FIAS))
Co-authors
Matthias Kaminski
(University of Alabama, Tuscaloosa)
Marcus Bleicher
(Uni Frankfurt)
