Holographic viscosity of fundamental matter

Abstract

A holographic dual of a finite-temperature SU(N{sub c}) gauge theory with a small number of flavors N{sub f} =}1/4{pi}. Given the known results for the entropy density, the contribution of the fundamental matter {eta}{sub fund} is therefore enhanced at strong 't Hooft coupling {lambda}; for example, {eta}{sub fund}{approx}{lambda}N{sub c}N{sub f}T{sup 3} in four dimensions. Other transport coefficients are analogously enhanced. These results hold with or without a baryon number chemical potential.