[1904.01402v1] Interparticle torques suppress motility-induced phase separation for
rodlike particles We gratefully acknowledge support from the Simons Foundation and member institutions. > cond-mat > arXiv:1904.01402v1 All papers Titles Authors Abstracts Full text (Help | Advanced search) Full-text links: Download: PDF Other formats Current browse context: cond-mat.stat-mech < prev | next > new | recent | 1904 Change to browse by: cond-mat References & Citations NASA ADS Bookmark (what is this?) Condensed Matter > Statistical Mechanics Title: Interparticle torques suppress motility-induced phase separation for rodlike particles Authors: Robin van Damme, Jeroen Rodenburg, René van Roij, Marjolein Dijkstra (Submitted on 2 Apr 2019) Abstract: To study the role of torque in motility-induced phase separation (MIPS), we simulate a system of self-propelled particles whose shape varies smoothly from isotropic (disks/spheres) to weakly elongated (rods). We construct the phase diagrams of 2D active disks, 3D active spheres and 2D/3D active rods of aspect ratio $l/\sigma=2$. A stability analysis of the homogeneous isotropic phase allows us to predict the onset of MIPS based on the effective swimming speed and rotational diffusion of the particles. Both methods find suppression of MIPS as the particle shape is elongated. We propose a suppression mechanism based on the duration of collisions, and argue that this mechanism can explain both the suppression of MIPS found here for rodlike particles and the enhancement of MIPS found for particles with Vicsek interactions. Subjects: Statistical Mechanics (cond-mat.stat-mech) DOI: 10.1063/1.5086733 Cite as: arXiv:1904.01402 [cond-mat.stat-mech] (or arXiv:1904.01402v1 [cond-mat.stat-mech] for this version) Submission history From: Robin van Damme [view email] [v1] Tue, 2 Apr 2019 13:29:10 GMT (3428kb,D) Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?) Link back to: arXiv, form interface, contact. About Help contact arXivClick here to contact arXiv Contact subscribe to arXiv mailingsClick here to subscribe Subscribe Copyright Privacy Policy Web Accessibility Assistance arXiv Operational Status Get status notifications via email or slack
