Dresden 2026 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 42: Poster: Quantum Dynamics and Many-body Systems (joint session DY/TT)

DY 42.2: Poster

Wednesday, March 11, 2026, 15:00–18:00, P5

Non-Perturbative Out-Of-Equilibrium Dynamics with Initial Four-Point-Correlations — Jürgen Berges, Louis Jussios, and •Cosima Schmitt — ITP Heidelberg

We investigate how initial correlations affect the equilibration dynamics of closed systems in quantum field theory. For interacting scalar fields with N components, we derive nonequilibrium evolution equations from a self-consistent large-N expansion to next-to-leading-order. By going beyond conventional Gaussian initial conditions, we point out the role of initial four-point correlations for the propagator evolution at early times and in the late-time approach to thermal equilibrium.

Keywords: Equilibration; Nonequilibrium; Initial Correlations; Quantum Field Theory; Large-N-Expansion