Regensburg 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
DY: Fachverband Dynamik und Statistische Physik
DY 24: Focus Session: Broken Symmetries in Statistical Physics - Dynamics of Odd Systems
DY 24.7: Hauptvortrag
Mittwoch, 19. März 2025, 16:45–17:15, H43
Odd dynamics and universal flows of passive objects in a chiral active fluid — •Cory Hargus1, Federico Ghimenti1,2, Julien Tailleur1,3, and Frédéric van Wijland1 — 1Laboratoire Matière et Systèmes Complexes (MSC), Université Paris Cité & CNRS (UMR 7057), 75013 Paris, France — 2Department of Applied Physics, Stanford University, 348 Via Pueblo, Stanford, CA 94305, United States of America — 3Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, United States of America
A passive object submerged in a chiral active fluid is imbued with odd diffusivity, odd mobility, and rotational ratchet motion. We show how these different effects are interrelated, obtaining a Langevin equation for a sufficiently heavy object, and how they are determined by the symmetry properties of the object, as well as its size and mass. Finally, spontaneous flows of the chiral active fluid around the object are understood through a multipole expansion, and connected through odd diffusion to equations of state involving only bulk fluid properties.
Keywords: Active matter; Odd transport phenomena; Effective temperature; Active ratchet