Anomalous viscosity of an expanding quark-gluon plasma

被引：121

作者：

Asakawa, M. ^{[1
]}

Bass, S. A.

Mueller, B.

机构：

[1] Osaka Univ, Dept Phys, Toyonaka, Osaka 5600043, Japan

[2] Duke Univ, Dept Phys, Durham, NC 27708 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.96.252301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We argue that an expanding quark-gluon plasma has an anomalous viscosity, which arises from interactions with dynamically generated color fields. We derive an expression for the anomalous viscosity in the turbulent plasma domain and apply it to the hydrodynamic expansion phase, when the quark-gluon plasma is near equilibrium. The anomalous viscosity dominates over the collisional viscosity for weak coupling and not too late times. This effect may provide an explanation for the apparent "nearly perfect" liquidity of the matter produced in nuclear collisions at the Relativistic Heavy Ion Collider without the assumption that it is a strongly coupled state.

引用

页数：4

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