Related Experiment Video
Updated: Jul 8, 2025

The Diffusion of Passive Tracers in Laminar Shear Flow
Published on: May 1, 2018
Characterizing a transition from limited to unlimited diffusion in energy for a time-dependent stochastic billiard
Felipe Augusto O Silveira1,2, Anne Kétri P da Fonseca1, Peter Schmelcher2,3
1Departamento de Física, UNESP - Universidade Estadual Paulista, Avenida 24A, 1515, Bela Vista, CEP 13506-900, Rio Claro, São Paulo, Brazil.
Abstract:
We explore Fermi acceleration in a stochastic oval billiard which shows unlimited to limited diffusion in energy when passing from the free to the dissipative case. We provide evidence for a transition from limited to unlimited energy growth taking place while detuning the corresponding restitution coefficient responsible for the degree of dissipation. A corresponding order parameter is suggested, and its susceptibility is shown to diverge at the critical point. We show that this order parameter is also be applicable to the periodically driven oval billiard and discuss the elementary excitation of the controlled diffusion process.
More Related Videos
12:15Image Processing Protocol for the Analysis of the Diffusion and Cluster Size of Membrane Receptors by Fluorescence Microscopy
Published on: April 9, 2019
00:10Single-Molecule Tracking Microscopy - A Tool for Determining the Diffusive States of Cytosolic Molecules
Published on: September 5, 2019
Related Concept Videos
Conservation of Linear Momentum for a System of Particles
The impulsive force at play during this interaction is of extremely short duration, rendering its impulse negligible. When...
Diffusion
Entropy
Physiological Pharmacokinetic Models: Blood Flow-Limited Versus Diffusion-Limited Models
The de Broglie Wavelength
Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion