Force Laws in Amorphous Solids and Emergent Many body Interactions

by Yoav Pollack

at Condensed Matter Theory Seminar

Wed, 14 Dec 2016, 13:30
Physics building (#54) room 207

Abstract

Inter particle forces in amorphous solids can be used to study phenomena such as jamming and force chains in both athermal and thermal systems In the athermal case e g athermal glasses and colloids we find the forces by expanding the force laws in a Laurent Taylor series of the particle distances Particle positions and the pressure are all that is required and the method is shown to accurately recover the force law in simulation In the thermal case using mean positions our method can predict an effective force law allowing for analysis of thermal systems using tools hitherto reserved for athermal ones and thereby the study of stability soft excitations etc Quite remarkably we also observe the emergence of effective many body interactions even when the bare interactions are purely 2 body

Created on 10-12-2016 by Bar Lev, Yevgeny (ybarlev)
Updaded on 10-12-2016 by Bar Lev, Yevgeny (ybarlev)