The status of the KSS bound and its possible violations (How perfect can a fluid be?)

Abstract

In this work we briefly review the Kovtun-Son-Starinet (KSS) computation of the ratio eta/s for quantum field theories with gravitational dual and the related conjecture that it is bound from below by 1/(4 pi). We discuss the validity of the bound and the nature of its possible violations, its relevance for RHIC, its connection with phase transitions and other related issues.

arXiv comment10 pages, 5figs, Invited talk at "10 years of AdS/CFT Correspondence", Buenos Aires, Dec. 2007, honoring Juan Maldacena

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Cited by in corpus (13)

• Transport Coefficients of Hadronic Matter near $T_c$
• Shear Viscosity from Effective Couplings of Gravitons
• Shear Viscosity from Gauss-Bonnet Gravity with a Dilaton Coupling
• Five Easy Pieces: The Dynamics of Quarks in Strongly Coupled Plasmas
• Lovelock theories, holography and the fate of the viscosity bound
• Bulk viscosity and the phase transition of the linear sigma model
• The first order hydrodynamics via AdS/CFT correspondence in the Gauss-Bonnet gravity
• Transport Coefficients from Extremal Gauss-Bonnet Black Holes
• A holographic model for large N thermal QCD
• Action complexity of charged black holes with higher derivative interactions
• Gravity/Fluid Correspondence and Its Application on Bulk Gravity with $U(1)$ Gauge Field
• Viscosity bound versus the universal relaxation bound
• Computational Complexity in Analogue Gravity