Berlin 2024 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 27: Active Matter III (joint session DY/BP/CPP)
CPP 27.8: Vortrag
Mittwoch, 20. März 2024, 11:45–12:00, BH-N 334
Phase Behaviour of a Minimal Chiral Active Ising Lattice Model — •Boyi Wang1,3, Frank Jülicher1, 4, 5, and Patrick Pietzonka2,1 — 1Max Planck Institute for the Physics of Complex Systems, Dresden, Germany — 2School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom — 3Institute of Physics, Chinese Academy of Sciences, Beijing, China — 4Center for Systems Biology Dresden (CSBD), Dresden, Germany — 5Cluster of Excellence, Physics of Life, TU Dresden, Dresden, Germany
We introduce chiral activity into a lattice model with Ising interactions, achieved by locally rotating a random selected 2 × 2 neighbourhood of lattice site each time step only in clockwise direction. Monte Carlo simulations at low temperature reveal a path to condensate formation, marked by the evolution of the droplet’s edge into a particular tilted orientation relative to the square lattice. This tilt angle depends on the local rotation direction, thus reflecting the chirality of the model on a macroscopic scale.
Furthermore, we investigate the stability of the chiral tilted angle in the droplet’s lattice field. We identify a persistent edge current flowing along the droplet’s interface. By an equivalent 1D model, we also quantify this current-angle dependence, allowing us to identify the angles that emerge in the stationary state.
Our findings provide a novel perspective on chiral non-equilibrium systems in a discrete and analytical framework, expanding our understanding of how chiral driving forces influence the formation and interface behaviour of active droplets.
Keywords: chirality; active Ising model; edge current flow; droplets formation