MAITRA, Ananyo; SRIVASTAVA, Pragya; MARCHETTI, M. Cristina; LINTUVUORI, Juho; RAMASWAMY, Sriram; LENZ, Martin

doi:10.1073/pnas.1720607115

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MAITRA, Ananyo
Laboratoire de Physique Théorique et Modèles Statistiques [LPTMS]

SRIVASTAVA, Pragya
Theoretical Physics of Biology Laboratory

MARCHETTI, M. Cristina
Department of Physics [Syracuse]

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Article de revue

Ce document a été publié dans

Proceedings of the National Academy of Sciences of the United States of America. 2018, vol. 115, n° 27, p. 6934-6939

National Academy of Sciences

Résumé en anglais

Suspensions of actively driven anisotropic objects exhibit distinctively nonequilibrium behaviors, and current theories predict that they are incapable of sustaining orientational order at high activity. By contrast, here we show that nematic suspensions on a substrate can display order at arbitrarily high activity due to a previously unreported, potentially stabilizing active force. This force moreover emerges inevitably in theories of active orientable fluids under geometric confinement. The resulting nonequilibrium ordered phase displays robust giant number fluctuations that cannot be suppressed even by an incompressible solvent. Our results apply to virtually all experimental assays used to investigate the active nematic ordering of self-propelled colloids, bacterial sus-pensions, and the cytoskeleton and have testable implications in interpreting their nonequilibrium behaviors.< Réduire

Mots clés en anglais

Active matter

Living liquid crystals

Confined active nematics

DOI

http://dx.doi.org/10.1073/pnas.1720607115

Projet Européen

Disordered assemblies of biofilaments: from aggregation to contractility
Dissecting active matter: Microscopic origins of macroscopic actomyosin activity

Project ANR

Idex Paris-Saclay - ANR-11-IDEX-0003
Impacts marchands, non marchands et structurels des réformes des politiques agricoles et agri-environnementales - ANR-05-PADD-0015

Origine

Importé de hal

Unités de recherche

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798