Asymmetric response of a jammed plastic bead raft

Abstract

Fluctuation-dissipation relations have received significant attention as a potential method for defining an effective temperature in nonequilibrium systems. The successful development of an effective temperature would be an important step in the application of statistical mechanics principles to systems driven far from equilibrium. Many of the systems of interest are sufficiently dense that they are close to the jamming transition, a point at which interesting correlations develop. Here we study the response function in a driven system of plastic beads as a function of the density in order to elucidate the impact of the jamming transition on the use of fluctuation-dissipation relations. The focus is on measuring the response function for applied shear stress. We find that even when the amplitude of the applied stress leads to a linear response in the strain, the time scale of the response is dependent on the direction of the applied stress.

References in corpus (18)

• Energy flow, partial equilibration and effective temperatures in systems with slow dynamics
• Particle dynamics in sheared granular matter
• Observing Brownian motion in vibration-fluidized granular matter
• Effective Temperatures of a Driven System Near Jamming
• Self-diffusion in dense granular shear flows
• Shearing a Glassy Material: Numerical Tests of Nonequilibrium Mode-Coupling Approaches and Experimental Proposals
• A fluidized granular medium as an instance of the Fluctuation Theorem
• Fluctuation theorem for non-equilibrium relaxational systems driven by external forces
• Experimental measurement of an effective temperature for jammed granular materials
• Experimental test of the Gallavotti-Cohen fluctuation theorem in turbulent flows
• Effective Temperatures in Driven Systems: Static vs. Time-Dependent Relations
• Fluctuation and Dissipation in Liquid Crystal Electroconvection
• Nonlinear Stress Fluctuation Dynamics of Sheared Disordered Wet Foam
• Thermal properties of slow dynamics
• Effective temperature and jamming transition in dense, gently sheared granular assemblies
• Configurational temperature of charge-stabilized colloidal monolayers
• Distribution of injected power fluctuations in electroconvection
• Slow Steady-Shear of Plastic Bead Rafts

Cited by in corpus (3)

• The effective temperature
• Granular Character of Particle Rafts
• Effective temperatures and activated dynamics for a two-dimensional air-driven granular system on two approaches to jamming