Strong Coupling between a Topological Qubit and a Nanomechanical Resonator

TL;DR

This paper proposes a scheme for achieving strong coherent coupling between a topological qubit and a nanomechanical resonator, enabling quantum state transfer and entanglement with high fidelity, which could facilitate hybrid quantum information processing.

Contribution

The paper introduces a novel method to couple topological qubits with nanomechanical resonators using magnetic tips and a quantum phase controller, enabling arbitrary unitary operations on the hybrid system.

Findings

High-fidelity quantum state transfer demonstrated in simulations

Entanglement distribution between topological and mechanical qubits shown

Strong coherent coupling achieved through magnetic tips and phase control

Abstract

We describe a scheme that enables a strong coherent coupling between a topological qubit and the quantized motion of a magnetized nanomechanical resonator. This coupling is achieved by attaching an array of magnetic tips to a namomechanical resonator under a quantum phase controller which coherently controls the energy gap of a topological qubit. Combined with single-qubit rotations the strong coupling enables arbitrary unitary transformations on the hybrid system of topological and mechanical qubits and may pave the way for the quantum information transfer between topological and optical qubits. Numerical simulations show that quantum state transfer and entanglement distributing between the topological and mechanical qubits may be accomplished with high fidelity.