# Control of the magnon-photon level attraction in a planar cavity

## TL;DR

This paper presents a circuit-based model to control and switch between level attraction and repulsion in a planar cavity photon-magnon system, demonstrating the universality of dissipative coupling.

## Contribution

It develops and verifies a circuit method to model and control dissipative and coherent couplings in a planar cavity system.

## Key findings

- Achieved controllable transition between level attraction and repulsion.
- Validated the circuit model with experimental results.
- Confirmed the universality of dissipative coupling in cavity systems.

## Abstract

A resistive coupling circuit is used to model the recently discovered dissipative coupling in a hybridized cavity photon-magnon system. With this model as a basis we have designed a planar cavity in which a controllable transition between level attraction and level repulsion can be achieved. This behaviour can be quantitatively understood using an LCR circuit model with a complex coupling strength. Our work therefore develops and verifies a circuit method to model level repulsion and level attraction and confirms the universality of dissipative coupling in the cavity photon-magnon system. The realization of both coherent and dissipative couplings in a planar cavity may provide new avenues for the design and adaptation of dissipatively coupled systems for practical applications in information processing.