title: Granular polymer solution.
abstract: We have measured the spectrum of fluctuations in the size of a granular polymer in a granular solvent. The system consists of a linear chain of plastic spheres immersed in a planar fluid of self-propelled balls. The time average of the end-to-end length r of the chain scales with the number of links N according to <r(2)> approximately N2nu, with nu=0.75+/-0.01. This provides an experimental test of the theoretical value nu=3 / 4 of the critical exponent for a self-avoiding random walk in two dimensions. The measured probability distribution P(r) is compared with the universal function of the scaling theory.
authors.affiliation: Department of Natural Sciences, University of Michigan at Dearborn, Dearborn, Michigan 48128, USA. jprentis@umd.umich.edu
authors.forename: Jeffrey J
authors.initials: JJ
authors.lastname: Prentis
authors.forename: Daniel R
authors.initials: DR
authors.lastname: Sisan