Shear viscosity in weakly coupled $\mathcal{N}=4$ Super Yang-Mills theory compared to QCD

Abstract

We compute the shear viscosity of weakly coupled N=4 supersymmetric Yang-Mills (SYM) theory. Our result for [eta/s], the viscosity to entropy-density ratio, is many times smaller than the corresponding weak-coupling result in QCD. This suggests that [eta/s] of QCD near the transition point is several times larger than the viscosity bound, [eta/s] >= 1/4 pi.

4 pages with 3 figures. References are corrected and minor changes are made. Conclusions unchanged

References in corpus (6)

• Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
• Energy loss of a heavy quark moving through N=4 supersymmetric Yang-Mills plasma
• Calculating the Jet Quenching Parameter from AdS/CFT
• Heavy Quark Diffusion in Strongly Coupled $\mathbb{N}=4$ Yang Mills
• On the Strongly-Interacting Low-Viscosity Matter Created in Relativistic Nuclear Collisions
• Photon and dilepton production in supersymmetric Yang-Mills plasma

Cited by in corpus (14)

• The centrality dependence of elliptic flow, the hydrodynamic limit, and the viscosity of hot QCD
• Light quark energy loss in strongly-coupled N = 4 supersymmetric Yang-Mills plasma
• String Theory and Quantum Chromodynamics
• Debye screening in strongly coupled N=4 supersymmetric Yang-Mills plasma
• Leading Order Calculation of Shear Viscosity in Hot Quantum Electrodynamics from Diagrammatic Methods
• Viscosity coefficients for hadron and quark-gluon phases
• Holography, Hydrodynamization and Heavy-Ion Collisions
• Causal Viscous Hydrodynamics for Relativistic Heavy Ion Collisions
• Transport across interfaces in symmetric orbifolds
• Universality of Hard-Loop Action
• Hard loop effective theory of the (anisotropic) quark gluon plasma
• Relativistic Heavy Ion Collisions: Viscous Hydrodynamic Simulations and Final State Interactions
• Scheme dependence of two-loop HTLpt-resummed ${\text{SYM}}_{4,4}$ thermodynamics
• Shear viscoelasticity in anisotropic holographic axion model