Viscosity in hot scalar field theory

Journal Article · Wed May 01 04:00:00 EDT 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.53.5978· OSTI ID:284034

Wang, E; Heinz, U ^[1]; Zhang, X ^[2]

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1. Institut fuer Theoretische Physik, Universitaet Regensburg, D-93040 Regensburg (Germany)
2. Institute of Particle Physics, Hua-Zhong Normal University, Wuhan 430070 (China)

The spectral representation for general two-point Green functions in thermo field dynamics is used to compute the spectral density of the {phi}{sup 2}-{phi}{sup 2} correlation function in hot {phi}{sup 4} theory. We give a compact derivation of the one-loop contribution to the shear viscosity and show that it is dominated by low-momentum plasmons. The weak-coupling behavior of the viscosity is strongly influenced by the momentum dependence of the plasmon width. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 284034
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 10 Vol. 53; ISSN 0556-2821; ISSN PRVDAQ
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
GREEN FUNCTION
PHI4-FIELD THEORY
PLASMONS
SCALAR FIELDS
SPECTRAL DENSITY
VISCOSITY
WIDTH