# Interfacing a topological qubit with a spin qubit in a hybrid quantum system

## TL;DR

This paper proposes a hybrid quantum system that couples a topological Majorana qubit with a spin qubit via a mechanical resonator, enabling quantum state conversion for quantum information processing.

## Contribution

It introduces a novel interface between topological and spin qubits using a magnetized torsional cantilever, facilitating quantum state transfer.

## Key findings

- Strong coupling of mechanical mode to both qubits demonstrated
- Quantum state conversion via dark state protocol proposed
- Potential applications in quantum information processing identified

## Abstract

We present and analyze a hybrid quantum system that interfaces a Majorana-hosted semiconductor nanowire with a single nitrogen-vacancy (NV) center via a magnetized torsional cantilever. We show that, the torsional mode of the mechanical resonator can strongly couple to the Majorana qubit and the spin qubit simultaneously, which allows to interface them for quantum state conversion through a dark state protocol. This work provides a promising interface between the topological qubit and the conventional spin qubit, and can find interesting applications in quantum information and computation.