SKM 2023 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 27: Statistical Physics: Far From Equilibrium I

DY 27.5: Vortrag

Mittwoch, 29. März 2023, 10:45–11:00, ZEU 250

Dynamical Renormalization Group Theory for Driven Systems — •Nikos Papanikolaou and Thomas Speck — Institute of Theoretical Physics 4, University of Stuttgart, Stuttgart, Germany

Active matter describes nonequilibrium systems that are self-driven due to their microscopic dynamics. These systems pose a fundamental physics challenge by unveiling new phenomena, not present in equilibrium systems, such as the Motility Induced Phase Separation; formation of clusters in the absence of any attractive interactions. To study analytically nonequilibrium complex systems, the Renormalization Group (RG) theory has been successfully used to extract the phase diagram, to study its qualitative behavior, and to explore the critical properties in the different phases. In this project, we explore a variation of RG called Dynamical RG to study self-driven systems by directly applying the RG to dynamical field equations such as the KPZ equation or the Active Model B+ which describe the stochastic evolution of systems like the population of bacteria, interfaces, and neural networks.

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