%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 }