Friction Induced Energy Gain

TL;DR

This paper demonstrates how friction facilitates non-linear energy transfer in slow-fast Hamiltonian systems, enabling energy gain in slow variables and allowing particles to reach higher energy states.

Contribution

It introduces a novel analysis of friction's role in energy transfer within coupled oscillators and extends the model to asymmetric double well systems.

Findings

Friction enables energy transfer from fast to slow degrees of freedom.

Friction allows particles to reach high energy stable equilibria.

Non-linear resonance is key to energy gain in the system.

Abstract

In this work we show how friction enables a non-linear energy transfer in a slow-fast Hamiltonian system. We first introduce a paradigmatic system consisting of a weakly coupled fast and slow oscillator that gives rise to a non-linear resonance. We state known Assertions about this system and the conservation of energy in the slow variables. We reexamine the system with friction in the slow degrees and identify two effects that lead to an energy transfer from the fast degrees of freedom to the slow degrees. We then replace the slow harmonic oscillator with an asymmetric double well system. Only with friction turned on the particle can move from lower energy to a high energy stable equilibrium point.