Athermal phase separation of self-propelled particles with no alignment.

By Y. Fily, Cristina M. Marchetti. Physical Review Letters, 2012

877 citations recorded by the source corpus.

We study numerically and analytically a model of self-propelled polar disks on a substrate in two dimensions. The particles interact via isotropic repulsive forces and are subject to rotational noise, but there is no aligning interaction. As a result, the system does not exhibit an ordered state. The isotropic fluid phase separates well below close packing and exhibits the large number fluctuations and clustering found ubiquitously in active systems. Our work shows that this behavior is a generic property of systems that are driven out of equilibrium locally, as for instance by self-propulsion.

Subfields: Condensed Matter Physics, Materials Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/4a61aa8dc75b35da8039bb228558a265623abc00

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Citations in the corpus

Classical dynamical density functional theory: from fundamentals to applications (2020, background): “Moreover, Dean’s results are of importance in active matter physics [248–255].”
Tuned, driven, and active soft matter (2015, background): “clusters imply large fluctuations of the local particle density [409].”
Irreversibility in Active Matter Systems: Fluctuation Theorem and Mutual Information (2018, methodology): “A particularly successful description of active fluctuations along these lines consists in a colored noise model, more specifically a Gaussian Ornstein-Uhlenbeck process [7, 15–18, 21–24, 28, 42, 46– 58].”
Temperature in and out of equilibrium: A review of concepts, tools and attempts (2017, background): “Other studies [303,304], apparently enforcing stronger self-propulsions, indicate that a temperature based upon linear response or diffusivity/mobility ratios is not a useful concept.”
Motility-driven glass and jamming transitions in biological tissues (2015, methodology): “[13] Yaouen Fily, Silke Henkes, and M. Cristina Marchetti.”
Pressure is not a state function for generic active fluids (2014, neutral): “Simulation results of ABPs evolving according to equations (1) and (7) are shown in Fig.”
Minimal model of active colloids highlights the role of mechanical interactions in controlling the emergent behavior of active matter (2015, methodology): “has included white Gaussian noise in the linear theory to evaluate correlation functions [22].”
The statistical physics of active matter: From self-catalytic colloids to living cells (2017, background): “Amicroscopic phenomenological picture has emerged to describeMIPS.”
Entropy production in field theories without time reversal symmetry: Quantifying the non-equilibrium character of active matter (2016, background): “[11] Yaouen Fily and M Cristina Marchetti, “Athermal phase separation of self-propelled particles with no alignment,” Physical review letters 108, 235702 (2012).”
Physics of microswimmers—single particle motion and collective behavior: a review (2014, methodology): “een performed to achieve a theoretical understanding of the generic principles underneath the propulsion-induced phase transitions (Bialke et al., 2013; Cates and Tailleur, 2013; Fily et al., 2014b; Fily and Marchetti, 2012; Stenhammar et al., 2014, 2013; Tailleur and Cates, 2008; Wittkowski et al.,”