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Breakdown of Ergodicity and Self-Averaging in Polar Flocks with Quenched Disorder
- Source :
- Phys. Rev. Lett. 126, 178001 (2021)
- Publication Year :
- 2020
-
Abstract
- We show that spatial quenched disorder affects polar active matter in ways more complex and far-reaching than believed heretofore. 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.<br />Comment: 6 pages, 5 figures, comments are welcome
- Subjects :
- Condensed Matter - Statistical Mechanics
Condensed Matter - Soft Condensed Matter
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 126, 178001 (2021)
- Publication Type :
- Report
- Accession number :
- edsarx.2010.02356
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.126.178001