29 novembre 2019
Collège de France
Fuseau horaire Europe/Paris

The Iris Billiard: Critical Geometries and Global Chaos.

Non programmé
20m
Amphitéâtre Marguerite de Navarre (Collège de France)

Amphitéâtre Marguerite de Navarre

Collège de France

Paris
Poster Physics Lunch & Posters session

Orateur

Gregory PAGE (LPTMC)

Description

A new class of 2D billiards, defined by a unit circle enclosing a geometrically variable, central scattering ellipse is introduced.

The system exhibits mixed dynamics which is explored via Recurrence plots (RPs) and the associated recurrence quantification analysis (RQA), with a focus on long-term motion starting from the unstable period 2 orbit.

The main result shows the existence of a set of critical ellipse geometries at which the dynamics undergoes a transition to global chaos.

Further results show the existence of counterintuitive, fractal behaviours within a well defined variable space at the moment of dynamical transition at these critical geometries.

The presentation will conclude with possible explanations of these behaviours.

Field

Maths

Language English

Auteurs principaux

Gregory PAGE (LPTMC) Dr Charles ANTOINE (LPTMC) Prof. Julian TALBOT (LPTMC)

Documents de présentation

Aucun document.