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Pressure is not a state function for generic active fluids
A. P. Solon, Y. Fily, A. Baskaran +4
Pressure is the mechanical force per unit area that a confined system exerts on its container. In thermal equilibrium, it depends only on bulk properties (density, temperature, etc…
Motility-Induced Phase Separation
Michael E. Cates, Julien Tailleur
Self-propelled particles include both self-phoretic synthetic colloids and various micro-organisms. By continually consuming energy, they bypass the laws of equilibrium thermodynam…
Large-scale fluctuations of the largest Lyapunov exponent in diffusive systems
Tanguy Laffargue, Peter Sollich, Julien Tailleur +1
We present a general formalism for computing the largest Lyapunov exponent and its fluctuations in spatially extended systems described by diffusive fluctuating hydrodynamics, thus…
From Phase to Micro-Phase Separation in Flocking Models: The Essential Role of Non-Equilibrium Fluctuations
Alexandre P. Solon, Hugues Chaté, Julien Tailleur
We show that the flocking transition in the Vicsek model is best understood as a liquid-gas transition, rather than an order-disorder one. The full phase separation observed in flo…
Locating a regular needle in a chaotic haystack, and conversely, using Lyapunov Weighted Dynamics
Tanguy Laffargue, Julien Tailleur
In many physical systems, dynamics is ruled by structures of atypical chaoticity. These structures may occupy a very small volume in phase space and can thus be very difficult to l…
Emergent spatial structures in flocking models: a dynamical system insight
Jean-Baptiste Caussin, Alexandre Solon, Anton Peshkov +5
We show that hydrodynamic theories of polar active matter generically possess inhomogeneous traveling solutions. We introduce a unifying dynamical-system framework to establish the…