Exploring wavefunction hybridization of magnon-magnon hybrid state

TL;DR

This paper models magnon-magnon hybrid states using a non-Hermitian Hamiltonian, demonstrating how wavefunction hybridization affects resonance properties and enabling better control for quantum information applications.

Contribution

It introduces a non-Hermitian two-band model for magnon hybridization and validates it with micromagnetic simulations, providing new insights into phase, amplitude, and dissipation effects.

Findings

Successful reproduction of resonance frequencies and linewidths

Hybridization influences dissipation and linewidth crossing

Quantification of hybridization on a magnonic Bloch sphere

Abstract

We investigate magnon magnon hybrid states using a non Hermitian two band Hamiltonian and the concept of wavefunction hybridization. By comparing our model with micromagnetic simulations conducted on a synthetic antiferromagnet with strong magnon magnon coupling, we successfully reproduce not only the resonance frequencies and linewidths but also the phases and amplitudes of the magnon wavefunction. The hybridization effect influences the dissipation rate, leading to the crossing of linewidths. Additionally, we quantify the magnon hybridization within a magnonic Bloch sphere, which enhances the ability to manipulate hybrid magnons for coherent information processing.