Speaker
Aleksi Vuorinen
(University of Helsinki)
Description
The postmerger dynamics of binary neutron-star merger events is known to be sensitive not only to the equation of state of the constituent matter, but also to its transport properties. A quantity of particular importance here is the bulk viscosity, which arises in a subtle interplay between the strong and electroweak interactions. In this talk, I will review a recent determination of the bulk viscosity of dense unpaired quark matter, utilizing both perturbative and holographic tools. In particular, I will derive a simple analytic expression for the quantity that agrees with first-principles perturbative results at ultrahigh densities, but remains applicable in the astrophysically relevant regime, where QCD is strongly coupled.
Author
Aleksi Vuorinen
(University of Helsinki)
