TY - JOUR
T1 - Athermal phase separation of self-propelled particles with no alignment
AU - Fily, Yaouen
AU - Marchetti, M. Cristina
PY - 2012/6/8
Y1 - 2012/6/8
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.108.235702
DO - 10.1103/PhysRevLett.108.235702
M3 - Article
AN - SCOPUS:84862237378
SN - 0031-9007
VL - 108
JO - Physical Review Letters
JF - Physical Review Letters
IS - 23
M1 - 235702
ER -