Regensburg 2019 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 20: Active Matter B (joint session DY/CPP)

DY 20.7: Vortrag

Dienstag, 2. April 2019, 15:30–15:45, H3

Spatially periodic patterns succeed active phase separation — •Lisa Rapp, Fabian Bergmann, and Walter Zimmermann — Theoretische Physik I, Universität Bayreuth, 95440 Bayreuth

We investigate a model equation for a conserved order-parameter field that covers as special cases the conserved Swift-Hohenberg model and the extended Cahn-Hilliard model for active phase separation. This model shows a primary bifurcation from a homogeneous state to large-scale phase separation - as typical for active phase separation [1,2]. We show here that with increasing distance from the primary bifurcation, however, a novel secondary bifurcation to spatially periodic patterns occurs. We explore these secondary periodic patterns in more detail including hysteresis and bistability/coexistence of patterns.

[1] F. Bergmann et al.: Phys. Rev. E 98, 020603(R) (2018)

[2] L. Rapp et al.: arXiv:1901.03203 (2019)