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DY: Fachverband Dynamik und Statistische Physik

DY 12: Statistical Physics far from Thermal Equilibrium II

DY 12.3: Vortrag

Montag, 18. März 2024, 15:30–15:45, BH-N 334

Pulsating with discrete symmetries: from microscopic dynamics to field theory — Massimiliano Esposito¹, Étienne Fodor¹, •Alessandro Manacorda¹, and Jan Meibohm² — ¹Department of Physics and Materials Science, University of Luxembourg — ²Institute for Theoretical Physics, Technische Universität Berlin

Deformable active matter is a growing research field: it enables to model and analyze collective dynamics in dense systems where units have the ability to change their shape, such as epithelial or cardiac tissues.

Collective behavior emerges through the propagation of waves with intriguing patterns. The latter are intimately related with the symmetries of the system: the transition between arrest and wave propagation requires a symmetry breaking mechanism. Coarse-graining the microscopic dynamics in the complex Ginzburg-Landau approach (CGLE) leads to fluctuating hydrodynamics with predictive power.

Surprisingly, the presence of a discrete symmetry makes the CGLE approach unsuitable to describe the dynamics. We will show how one can build an active field theory with the prescribed symmetries, and how these affect the active phases and pattern formation at hydrodynamic level, opening the door to field theories of pulsating active matter.

Keywords: Active Matter; Nonequilibrium field theory; Fluctuating hydrodynamics; Lattice models; Soft matter