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Jun 24 – 28, 2019
US/Eastern timezone
5th International Conference on the Initial Stages in High-Energy Nuclear Collisions

Non-equilibrium Green’s functions for energy-momentum perturbations around Bjorken flow from the Boltzmann equation in relaxation time approximation

Jun 25, 2019, 4:01 PM
1m
8th floor Theory Center (Pupin)

8th floor Theory Center

Pupin

Poster Approach to equilibrium (weak & strong coupling) Posters

Speakers

Soeren Schlichting (University of Washington)Dr Mauricio Martinez (North Carolina State University)

Description

Non-equilibrium Green's functions provide an efficient tool to describe the evolution of the energy-momentum tensor during the early time pre-equilibrium stage, and provide a meaningful to address the question when and to what extent a hydrodynamic description of the system becomes applicable. We present a calculation of the Green's functions describing the evolution of energy density perturbations in the transverse plane, based on the Boltzmann equation in relaxation time approximation. We discuss the approach towards viscous hydrodynamics along with the emergence of various scaling phenomena for conformal systems. By comparing our results obtained in the relaxation time approximation to previous calculations in QCD kinetic theory, we further address the question which macroscopic features of the energy momentum tensor are sensitive to the underlying microscopic dynamics.

Primary authors

Soeren Schlichting (University of Washington) Dr Mauricio Martinez (North Carolina State University) Dr Syo Kamata (North Carolina State University)

Presentation materials