par Bigazzi, Francesco ;Cotroneb, Aldo A.L.;Tarrio, Javier
Référence The Journal of high energy physics, 2010, 2, 083
Publication Publié, 2010
Article révisé par les pairs
Résumé : First and second order transport coefficients are calculated for the strongly coupled N = 4 SYMplasma coupled to massless fundamental matter in the Veneziano limit. The results, including among others the value of the bulk viscosity and some relaxation times, are presented at next-to-leading order in the flavor contribution. The bulk viscosity is found to saturate Buchel's bound. This result is also captured by an effective singlescalar five-dimensional holographic dual in the Chamblin-Reall class and it is suggested to hold, in the limit of small deformations, for generic plasmas with gravity duals, whenever the leading conformality breaking effects are driven by marginally (ir)relevant operators. This proposal is then extended to other relations for hydrodynamic coefficients, which are conjectured to be universal for every non-conformal plasma with a dual Chamblin-Realllike description. Our analysis extends to any strongly coupled gauge theory describing the low energy dynamics of N c ≫ 1 D3-branes at the tip of a generic Calabi-Yau cone. The fundamental fields are added by means of 1 ≪ N f ≪ N c homogeneously smeared D7-branes. © SISSA 2010.