Topologically protected dynamics in three-dimensional nonlinear antisymmetric Lotka-Volterra systems

TL;DR

This paper explores the robust topological boundary modes in three-dimensional nonlinear antisymmetric Lotka-Volterra systems, revealing their connection to linearized topological bands and demonstrating their relevance beyond linear regimes.

Contribution

It introduces the concept of topological boundary modes in 3D nonlinear systems governed by ALVE, extending topological band theory to nonlinear dynamical contexts.

Findings

Surface polarized masses exhibit robustness and distinct characteristics.

Insights from linear Weyl semimetal phases are applicable to nonlinear ALVE.

Topological boundary modes are relevant in high-dimensional nonlinear systems.

Abstract

Studies of topological bands and their associated low-dimensional boundary modes have largely focused on linear systems. This work reports robust dynamical features of three-dimensional (3D) nonlinear systems in connection with intriguing topological bands in 3D. Specifically, for a 3D setting of coupled rock-paper-scissors cycles governed by the antisymmetric Lotka-Volterra equation (ALVE) that is inherently nonlinear, we unveil distinct characteristics and robustness of surface polarized masses and analyze them in connection with the dynamics and topological bands of the linearized Lotka-Volterra (LV) equation. Our analysis indicated that insights learned from Weyl semimetal phases with type-I and type-II Weyl singularities based on a linearized version of the ALVE are still remarkably useful, even though the system dynamics is far beyond the linear regime. This work indicates the relevance and importance of the concept of topological boundary modes in analyzing high-dimensional nonlinear systems and hopes to stimulate another wave of topological studies in nonlinear systems.