On Bulk Viscosity at Weak and Strong 't Hooft Couplings
Abstract
Bulk viscosity is an important transport coefficient that exists in the hydrodynamical limit only when the underlying theory is non-conformal. One example being thermal QCD with large number of colors. We study bulk viscosity in such a theory at low energies and at weak and strong 't Hooft couplings when the temperature is above the deconfinement temperature. The weak coupling analysis is based on Boltzmann equation from kinetic theory whereas the strong coupling analysis uses non-conformal holographic techniques from string and M-theories. Using these, many properties associated with bulk viscosity may be explicitly derived. This is a shortened companion paper that summarizes some of the results of our longer paper arXiv:1807.04713.
Cite
@article{arxiv.1807.07950,
title = {On Bulk Viscosity at Weak and Strong 't Hooft Couplings},
author = {Alina Czajka and Keshav Dasgupta and Charles Gale and Sangyong Jeon and Aalok Misra and Michael Richard and Karunava Sil},
journal= {arXiv preprint arXiv:1807.07950},
year = {2018}
}
Comments
18 pages, 3 figures, Companion paper