English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Breakdown of Ergodicity and Self-Averaging in Polar Flocks with Quenched Disorder

MPS-Authors
/persons/resource/persons243224

Mahault,  Benoit       
Department of Living Matter Physics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Duan, Y., Mahault, B., Ma, Y.-q., Shi, X.-q., & Chaté, H. (2021). Breakdown of Ergodicity and Self-Averaging in Polar Flocks with Quenched Disorder. Physical Review Letters, 126: 178001. doi:10.1103/PhysRevLett.126.178001.


Cite as: https://hdl.handle.net/21.11116/0000-0009-C7E9-0
Abstract
We show that spatial quenched disorder affects polar active matter in ways more complex and far reaching than heretofore believed. Using simulations of the 2D Vicsek model subjected to random couplings or a disordered scattering field, we find in particular that ergodicity is lost in the ordered phase, the nature of which we show to depend qualitatively on the type of quenched disorder: for random couplings, it remains long-range ordered, but qualitatively different from the pure (disorderless) case. For random scatterers, polar order varies with system size but we find strong non-self-averaging, with sample-to-sample fluctuations dominating asymptotically, which prevents us from elucidating the asymptotic status of order.