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Spectral representation of the shear viscosity for local scalar QFTs at finite temperature

In local scalar quantum field theories at finite temperature correlation functions are known to satisfy certain nonperturbative constraints, which for two-point functions in particular implies the existence of a generalization of the standard Källén-Lehmann representation. In this work, we use the...

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Hauptverfasser: Lowdon, Peter (VerfasserIn) , Tripolt, Ralf-Arno (VerfasserIn) , Pawlowski, Jan M. (VerfasserIn) , Rischke, Dirk H. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 13 September 2021
In: Physical review
Year: 2021, Jahrgang: 104, Heft: 6, Pages: 1-13
ISSN:2470-0029
DOI:10.1103/PhysRevD.104.065010
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.104.065010
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.104.065010
Volltext
Verfasserangaben:Peter Lowdon, Ralf-Arno Tripolt, Jan M. Pawlowski, and Dirk H. Rischke
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Zusammenfassung:In local scalar quantum field theories at finite temperature correlation functions are known to satisfy certain nonperturbative constraints, which for two-point functions in particular implies the existence of a generalization of the standard Källén-Lehmann representation. In this work, we use these constraints in order to derive a spectral representation for the shear viscosity arising from the thermal asymptotic states, η0. As an example, we calculate η0 in ϕ4 theory, establishing its leading behavior in the small and large coupling regimes.
Beschreibung:Gesehen am 05.11.2021
Beschreibung:Online Resource
ISSN:2470-0029
DOI:10.1103/PhysRevD.104.065010

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