Topological state transfers in cavity-magnon system

TL;DR

This paper presents a feasible scheme for quantum state transfer using topological edge states in a cavity-magnon lattice, mapping it to a generalized SSH model, enabling high-fidelity photonic and magnonic state transfers.

Contribution

It introduces a novel cavity-magnon system mapped to a generalized SSH model for topological quantum state transfer with tunable parameters.

Findings

High-fidelity photonic and magnonic state transfers achieved.

State transfer schemes can be transformed controllably.

Numerical simulations confirm the effectiveness of the scheme.

Abstract

We propose an experimentally feasible scheme for realizing quantum state transfer via the topological edge states in a one-dimensional cavity-magnon lattice. We find that the cavity-magnon system can be mapped analytically into the generalized Su-Schrieffer-Heeger model with tunable cavity-magnon coupling. It can be shown that the edge state can be served as a quantum channel to realize the photonic and magnonic state transfers by adjusting the cavity-cavity coupling strength. Further, our scheme can realize the quantum state transfer between photonic state and magnonic state by changing the amplitude of the intracell hopping. With a numerical simulation, we quantitatively show that the photonic, magnonic and magnon-to-photon state transfers can be achieved with high fidelity in the cavity-magnon lattice. Spectacularly, the three different types of quantum state transfer schemes can be even transformed to each other in a controllable fashion. This system provides a novel way of realizing quantum state transfer and can be implemented in quantum computing platforms.