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论文类型：期刊论文

发表时间：2013-08-23

发表刊物：Phys.Rev. D

学科门类：理学

一级学科：物理学

卷号：88

期号：3

页面范围：036012

摘要：Within the Nambu–Jona-Lasinio model the temperature dependence of the shear viscosity is calculated to the first nontrivial order in the 1/Nc expansion with Φ-derivable approximations. The two-particle irreducible effective action is computed to next-to-leading order, from which the integral equations for the 3- and 4-point vertices are obtained. These sum infinite sets of diagrams contributing to the shear viscosity at the same order in the 1/Nc expansion. We find that the shear viscosity decreases rapidly when the chiral crossover is approached. Comparing with the hadron phase, the quark-glu