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Journal of Statistical Physics

, Volume 175, Issue 2, pp 213–232 | Cite as

Billiards and Toy Gravitons

  • Alfonso ArtigueEmail author
Article
  • 44 Downloads

Abstract

In this article we study the one-dimensional dynamics of elastic collisions of particles with positive and negative mass. We show that such systems are equivalent to billiards induced by an inner product of possibly indefinite signature, we characterize the systems with finitely many collisions and we prove that a small particle of negative mass between two particles of positive mass acts like an attracting particle with discrete acceleration (at the collisions) provided that the total kinetic energy is negative. In the limit of the negative mass going to zero, with fixed negative kinetic energy, we obtain a continuous acceleration with potential energy of the form \(U(r)=-k/r^2\).

Keywords

Billiard Negative mass Elastic collision 

Notes

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Departamento de Matemática y Estadística del LitoralUniversidad de la RepúblicaSaltoUruguay

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