PT-Symmetric magnetic Chaos in cavity magnomechanics

Abstract

Here, we research a novel cavity magnomechanical system, where magnon driven by a microwave field couples with a phonon mode with a nonlinear magneostrictive interaction (radiation pressure-like). Based on this interaction, we numerically demonstrate PT-symmetric chaos in this system. With only one monochrome driving, the chaotic threshold is lowered to a rather low levels, this is due to the dynamical enhancement of nonlinearity in the PT-symmetry broken phase. Moreover, by simply manipulating the phase transition between PT-symmetry phase and PT-symmetry broken phase, we can switch the system between into and out of chaotic regimes. Our work may broaden the cavity magnomechanics and provide a promising application for magnetic chaos-related security communications.