Berlin 2024 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 24: Focus Session: New Trends in Nonequilibrium Physics – Conservation Laws and Nonreciprocal Interactions I

Mittwoch, 20. März 2024, 09:30–13:00, BH-N 243

Nonequilibrium phase transitions and pattern formation are known from numerous examples of open systems, where external reservoirs and gradients prevent relaxation to thermodynamic equilibrium. In recent years, related research in biology and soft matter systems in physics and chemistry has increasingly focused on active matter, where energy is injected locally. This often involves mass conservation constraints and, in many cases, in addition non-reciprocal interactions of the involved entities, such as macromolecules or cells. Both have far reaching consequences on the universal dynamical behavior of a wide range of nonequilibrium systems and require classical concepts of nonlinear and statistical physics, such as phase transitions, to be reconsidered and developed further. For example, well-known approaches to nonequilibrium pattern formation require substantial extensions to address conserved systems. Thus, recent theoretical studies in this field have revealed many novel phenomena, such as arrested coarsening, odd elasticity, oscillatory phase separation, persistent wave dynamics, and active turbulence. Many of these aspects have by now been confirmed by experimental findings, for example, in intracellular pattern formation or collective dynamics in colloidal systems. This symposium will provide a well-balanced overview of experimental and theoretical progress in this new, exciting area.

Organized by Markus Bär (Berlin) and Carsten Beta (Potsdam)

	09:30	DY 24.1	Hauptvortrag: The nonreciprocal Cahn-Hilliard model - properties and significance — •Uwe Thiele, Tobias Frohoff-Hülsmann, and Daniel Greve
	10:00	DY 24.2	Field-theoretical modeling of a zombie apocalypse* — •Michael te Vrugt, Julian Jeggle, and Raphael Wittkowski
	10:15	DY 24.3	Maxwell construction for a nonreciprocal Cahn-Hilliard model — •Daniel Greve, Tobias Frohoff-Hülsmann, and Uwe Thiele
	10:30	DY 24.4	Non-reciprocal alignment can induce asymmetric clustering in active repulsive mixtures — •Kim L. Kreienkamp and Sabine H. L. Klapp
	10:45	DY 24.5	Mobility-induced condensation and (rotating) crystallization in a higher-order active Phase Field Crystal model — •Alina Barbara Steinberg, Max Philip Holl, and Uwe Thiele
	11:00	DY 24.6	Deciphering the interface laws of Turing foams — Henrik Weyer, •Tobias Roth, and Erwin Frey
	11:15		15 min. break
	11:30	DY 24.7	Traveling waves and arrested coarsening in a simple model for protein patterns on biomembranes — •Benjamin Winkler, Sergio Alonso, and Markus Bär
	11:45	DY 24.8	Defect Solutions of the Non-reciprocal Cahn-Hilliard Model: Spirals and Targets — •Navdeep Rana and Ramin Golestanian
	12:00	DY 24.9	Liquid mechanics - Exploring instabilities in active condensates — •Florian Rasshofer, Simon Bauer, Alexander Ziepke, Ivan Maryshev, and Erwin Frey
	12:15	DY 24.10	Self-excited oscillations and motion of sessile drops covered by autocatalytic surfactants — •Florian Voss and Uwe Thiele
	12:30	DY 24.11	Escaping kinetic traps using non-reciprocal interactions — Saeed Osat, •Jakob Metson, Mehran Kardar, and Ramin Golestanian
	12:45	DY 24.12	Correlation effects in the non-reciprocal Ising system — •Kristian Blom, Uwe Thiele, and Aljaz Godec