Stress-stress correlator in ϕ4 theory: poles or a cut?

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Regular Article - Theoretical Physics
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Abstract

We explore the analytical properties of the traceless stress tensor 2-point function at zero momentum and small frequency (relevant for shear viscosity and hydrodynamic response) in hot, weakly coupled λϕ4 theory. We show that, rather than one or a small number of poles, the correlator has a cut along the negative imaginary frequency axis. We briefly discuss this result’s relevance for constructing 2’nd order hydrodynamic models of hot relativistic field theories.

Keywords

Thermal Field Theory Quark-Gluon Plasma 

Notes

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Copyright information

© The Author(s) 2018

Authors and Affiliations

  1. 1.Institut für Kernphysik, Technische Universität DarmstadtDarmstadtGermany

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