2009/12/24 by Jorge Noronha, Noronha, Jorge
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #hep-ph #hep-th #nucl-th
paper · pdf · doi:10.48550/arxiv.0912.4824
10 pages, conclusions changed, references added
openalex publication_date 2009/12/24 · arxiv created 2010/03/06 · arxiv updated 2010/03/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Below the deconfinement phase transition large Nc QCD is expected to be a very viscous hadronic fluid because both the shear and bulk viscosity to entropy density ratio, η/s,ζ/s ∼ Nc2. In this letter I show that η/s ∼ Nc2 in the confined phase of holographic models of QCD at large Nc defined in the supergravity approximation. Our results show that the gauge/string duality can be used to describe not only nearly perfect fluids but also extremely viscous systems such as a cold gas of glueballs.