Topologically protected dynamics in three-dimensional nonlinear antisymmetric Lotka-Volterra systems
arXiv:2203.06936 · doi:10.1103/PhysRevB.106.L241403
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.
arXiv commentsome figures replotted and a few minor changes to the main text
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