Journal article

Publication year: 2022

Journal: Physical Review D

Volume number: 106

Issue number: 5

ISSN: 2470-0010

eISSN: 2470-0029

Open access status: Hybrid

DOI Link: https://doi.org/10.1103/PhysRevD.106.056006

Publisher: American Physical Society

Abstract: 
In this work we apply a local quantum field theory (QFT) approach in order to analyze the connection between real-time observables and Euclidean thermal correlation functions. In particular, using data generated from the functional renormalization group (FRG) in the quark-meson model, we demonstrate that in-medium effects can be directly extracted from the spatial momentum dependence of the Euclidean propagators, in contrast to conventional approaches, which rely on the reconstruction from different Matsubara frequencies. As an application, we determine the analytic features that arise from the discrete spectral contribution to the pion correlation function, and calculate the nonperturbative shear viscosity arising from these states.

Harvard Citation style: Lowdon, P. and Tripolt, R. (2022) Real-time observables from Euclidean thermal correlation functions, Physical Review D, 106(5), Article 056006. https://doi.org/10.1103/PhysRevD.106.056006

APA Citation style: Lowdon, P., & Tripolt, R. (2022). Real-time observables from Euclidean thermal correlation functions. Physical Review D. 106(5), Article 056006. https://doi.org/10.1103/PhysRevD.106.056006