F. Peruani, A. Deutsch, и M. Baer. Abstract Book of the XXIII IUPAP International Conference on Statistical Physics, Genova, Italy, (9-13 July 2007)
Аннотация
Motivated by aggregation and orientation phenomena in gliding bacteria, we study collective motion in a two-dimensional model of active, self-propelled rods interacting through volume exclusion. In simulations with individual particles, we find that particle clustering is facilitated by a sufficiently large packing fraction or length-to-width aspect ratio. We show that the transition to clustering is well captured by a mean-field which predicts that critical particle aspect ratio $\kappa_c$ that triggers clustering is a function of the packing fraction $\eta$ such that $\kappa_c = C/- 1$, where $C$ is a constant 1.
We also find that self-propelled particles interacting through a liquid crystal-alignment, as in the case of self-propelled rods, exhibit in two-dimensions a phase-transition to global orientational order which is highly dependent on particle density. We show that the interplay between clustering and orientation dynamics determines the type of phase-transition.
1) F. Peruani, A. Deutsch, M. Baer, Phys. Rev. E, 74, 030904 (R), (2006).
%0 Book Section
%1 statphys23_1045
%A Peruani, F.
%A Deutsch, A.
%A Baer, M.
%B Abstract Book of the XXIII IUPAP International Conference on Statistical Physics
%C Genova, Italy
%D 2007
%E Pietronero, Luciano
%E Loreto, Vittorio
%E Zapperi, Stefano
%K active biological collective formation motion nematic non-equilibrium pattern self-organization statphys23 swarming systems topic-10
%T Non-equilibrium phenomena in self-propelled rods
%U http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=1045
%X Motivated by aggregation and orientation phenomena in gliding bacteria, we study collective motion in a two-dimensional model of active, self-propelled rods interacting through volume exclusion. In simulations with individual particles, we find that particle clustering is facilitated by a sufficiently large packing fraction or length-to-width aspect ratio. We show that the transition to clustering is well captured by a mean-field which predicts that critical particle aspect ratio $\kappa_c$ that triggers clustering is a function of the packing fraction $\eta$ such that $\kappa_c = C/- 1$, where $C$ is a constant 1.
We also find that self-propelled particles interacting through a liquid crystal-alignment, as in the case of self-propelled rods, exhibit in two-dimensions a phase-transition to global orientational order which is highly dependent on particle density. We show that the interplay between clustering and orientation dynamics determines the type of phase-transition.
1) F. Peruani, A. Deutsch, M. Baer, Phys. Rev. E, 74, 030904 (R), (2006).
@incollection{statphys23_1045,
abstract = {Motivated by aggregation and orientation phenomena in gliding bacteria, we study collective motion in a two-dimensional model of active, self-propelled rods interacting through volume exclusion. In simulations with individual particles, we find that particle clustering is facilitated by a sufficiently large packing fraction or length-to-width aspect ratio. We show that the transition to clustering is well captured by a mean-field which predicts that critical particle aspect ratio $\kappa_{c}$ that triggers clustering is a function of the packing fraction $\eta$ such that $\kappa_{c} = C/\eta - 1$, where $C$ is a constant [1].
We also find that self-propelled particles interacting through a liquid crystal-alignment, as in the case of self-propelled rods, exhibit in two-dimensions a phase-transition to global orientational order which is highly dependent on particle density. We show that the interplay between clustering and orientation dynamics determines the type of phase-transition.
1) F. Peruani, A. Deutsch, M. Baer, Phys. Rev. E, 74, 030904 (R), (2006).},
added-at = {2007-06-20T10:16:09.000+0200},
address = {Genova, Italy},
author = {Peruani, F. and Deutsch, A. and Baer, M.},
biburl = {https://www.bibsonomy.org/bibtex/25ad29538c2805b0b5a3b490b1e092237/statphys23},
booktitle = {Abstract Book of the XXIII IUPAP International Conference on Statistical Physics},
editor = {Pietronero, Luciano and Loreto, Vittorio and Zapperi, Stefano},
interhash = {925e12e7f9785e4b8d1a4492706ab313},
intrahash = {5ad29538c2805b0b5a3b490b1e092237},
keywords = {active biological collective formation motion nematic non-equilibrium pattern self-organization statphys23 swarming systems topic-10},
month = {9-13 July},
timestamp = {2007-06-20T10:16:37.000+0200},
title = {Non-equilibrium phenomena in self-propelled rods},
url = {http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=1045},
year = 2007
}