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DY: Fachverband Dynamik und Statistische Physik

DY 36: Active Matter 3 - organized by Carsten Beta (Potsdam), Andreas Menzel (Magdeburg) and Holger Stark (Berlin) (joint session DY/BP)

DY 36.1: Talk

Wednesday, March 24, 2021, 09:00–09:20, DYb

Localized States in active Phase-Field-Crystal models — •Max Philipp Holl¹, Lukas Ophaus^{1, 2}, Svetlana Gurevich^{1, 2}, and Uwe Thiele^{1, 2} — ¹Institut für Theoretische Physik, Münster, Germany — ²Center for Nonlinear Science, Münster, Germany

The phase-field-crystal (PFC) model represents a gradient dynamics of a single order parameter field related to density and is able to describe crystallisation processes. The model describes a variety of spatially extended periodic and localized steady structures. In an active PFC model, encoding for instance the active motion of self-propelled colloidal particles, the PFC model's gradient dynamics structure is broken by a nonreciprocal coupling of density and an additional polarization field. Then, resting and traveling localized states exist with transitions characterized by parity-breaking drift bifurcations. We briefly review the snaking behavior of localized states in passive and active PFC models before discussing the bifurcation behaviour of localized states in systems of (i) two passive PFC with nonreciprocal coupling and (ii) coupled passive and active PFCs.