Discrete breathers in thermal equilibrium: distributions and energy gaps

TL;DR

This paper investigates the existence and distribution of discrete breathers in a 2D nonlinear lattice at thermal equilibrium, introducing a novel cooling method to analyze their energy thresholds and distribution properties.

Contribution

It presents a new computational technique using cooling to measure and analyze discrete breather distributions at thermal equilibrium, confirming an energy threshold for breathers.

Findings

Existence of an energy threshold for discrete breathers

Cooling method effectively measures breather distributions

Discrete breathers are present at thermal equilibrium

Abstract

We study a discrete two-dimensional nonlinear system that allows for discrete breather solutions. We perform a spectral analysis of the lattice dynamics at thermal equilibrium and use a cooling technique to measure the amount of breathers at thermal equilibrium. Our results confirm the existence of an energy threshold for discrete breathers. The cooling method provides with a novel computational technique of measuring and analyzing discrete breather distribution properties in thermal equilibrium.