2009/11/23 by Antal Jakovác, A. Jakovac · 15 citations
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Conformal map #Cosmology and Gravitation Theories #Density ratio #Entropy (arrow of time) #High-Energy Particle Collisions Research #Materials science #Mathematical analysis #Mathematics #Mechanics #Physics #Shear (geology) #Shear viscosity #Statistical physics #Thermodynamics #Upper and lower bounds #Viscosity #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.81.045020
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 81(4) (American Physical Society) · 14 pages, 2 figures, revtex4; references added, minor corrections in the text
arxiv created 2009/11/23 · openalex publication_date 2010/02/24 · arxiv updated 2014/11/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The lower bound of the shear viscosity to entropy density ratio is examined using an exact representation of the ratio through the density of states. Under certain assumptions it can be shown that the lower bound of the ratio is not universal; its value is determined by the entropy density. Some examples of physical systems are discussed in the paper where one can expect violation of the conformal 1/4\ensuremathπ value.