Quantitative Assessment of the Toner and Tu Theory of Polar Flocks - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Accéder directement au contenu
Article Dans Une Revue Physical Review Letters Année : 2019

Quantitative Assessment of the Toner and Tu Theory of Polar Flocks

Résumé

We present a quantitative assessment of the Toner and Tu theory describing the universal scaling of fluctuations in polar phases of dry active matter. Using large-scale simulations of the Vicsek model in two and three dimensions, we find the overall phenomenology and generic algebraic scaling predicted by Toner and Tu, but our data on density correlations reveal some qualitative discrepancies. The values of the associated scaling exponents we estimate differ significantly from those conjectured in 1995. In particular, we identify a large crossover scale beyond which flocks are only weakly anisotropic. We discuss the meaning and consequences of these results.

Dates et versions

cea-04344832 , version 1 (14-12-2023)

Identifiants

Citer

Benoît Mahault, Francesco Ginelli, Hugues Chaté. Quantitative Assessment of the Toner and Tu Theory of Polar Flocks. Physical Review Letters, 2019, 123 (21), pp.218001. ⟨10.1103/PhysRevLett.123.218001⟩. ⟨cea-04344832⟩
9 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More