159 articles – 2000 Notices  [english version]
HAL : in2p3-00714892, version 1

Fiche concise  Récupérer au format
Holographic bulk viscosity: GPR vs EO
Buchel A., Gursoy U., Kiritsis E.
Journal of High Energy Physics 9 (2011) 95 - http://hal.in2p3.fr/in2p3-00714892
Physique/Physique des Hautes Energies - Théorie
Holographic bulk viscosity: GPR vs EO
A. Buchel1, U. Gursoy2, E. Kiritsis3, 4
1 :  Perimeter Institute
Perimeter Institute
Canada
2 :  CERN - European Organization for Nuclear Research
http://www.cern.ch
CERN
Suisse
3 :  APC - UMR 7164 - AstroParticule et Cosmologie
http://www.apc.univ-paris7.fr/
CNRS : UMR7164 – IN2P3 – Observatoire de Paris – Université Paris VII - Paris Diderot – CEA : DSM/IRFU
APC - UMR 7164, Université Paris Diderot, 10 rue Alice Domon et Léonie Duquet, case postale 7020, F-75205 Paris Cedex 13
France
4 :  Physics Department
http://www.uoc.gr/Department/index.html
University of Crete
University of Crete Department of Physics P.O Box 2208 GR-71003 Heraklion, Greece
Grèce
APC - THEORIE
Recently Eling and Oz (EO) proposed a formula for the holographic bulk viscosity, in arXiv:1103.1657, derived from the null horizon focusing equation. This formula seems different from that obtained earlier by Gubser, Pufu and Rocha (GPR) in arXiv:0806.0407 calculated from the IR limit of the two-point function of the trace of the stress tensor. The two were shown to agree only for some simple scaling cases. We point out that the two formulae agree in two non-trivial holographic theories describing RG flows. The first is the strongly coupled N=2* gauge theory plasma. The second is the semi-phenomenological model of Improved Holographic QCD.

Articles dans des revues avec comité de lecture
2011
Journal of High Energy Physics
Publisher Institute of Physics (IOP)
ISSN 1126-6708 (eISSN : 1029-8479)
9
95

21 pages, 2 figures
Lien vers le texte intégral : 
http://fr.arXiv.org/abs/1104.2058