Quantum synchronization between two strongly driven YIG spheres mediated via a microwave cavity

TL;DR

This paper theoretically investigates how two strongly driven YIG spheres can synchronize via a microwave cavity, revealing conditions for classical and quantum synchronization and emphasizing the impact of thermal noise.

Contribution

It introduces a model for cavity-mediated synchronization of magnon modes in YIG spheres, analyzing both classical and quantum regimes with insights into thermal noise effects.

Findings

Synchronization occurs under specific coupling and detuning conditions.

Quantum synchronization is sensitive to thermal noise.

The study offers insights for tunable magnonic quantum technologies.

Abstract

We present a theoretical study of synchronization between two strongly driven magnon modes indirectly coupled via a single-mode microwave cavity. Each magnon mode, hosted in separate Yttrium Iron Garnet spheres, interacts coherently with the cavity field, leading to cavity-mediated nonlinear coupling. We show, by using input-output formalism, that both classical and quantum synchronization emerge for appropriate choices of coupling, detuning, and driving. We find that thermal noise reduces quantum synchronization, highlighting the importance of low-temperature conditions. This study provides useful insights into tunable magnonic interactions in cavity systems, with possible applications in quantum information processing and hybrid quantum technologies.