# Topological networks for quantum communication between distant qubits

## TL;DR

This paper proposes a topological bosonic network for robust, efficient quantum communication between distant qubits, featuring global control, disorder resilience, and near-linear scaling with distance.

## Contribution

It introduces a novel topological network architecture enabling scalable, robust quantum communication with minimal local control and high resilience to disorder.

## Key findings

- Robust quantum information transfer over large distances.
- Global parameter variations suffice for all operations.
- Communication time scales nearly linearly with distance.

## Abstract

Efficient communication between qubits relies on robust networks which allow for fast and coherent transfer of quantum information. It seems natural to harvest the remarkable properties of systems characterized by topological invariants to perform this task. Here we show that a linear network of coupled bosonic degrees of freedom, characterized by topological bands, can be employed for the efficient exchange of quantum information over large distances. Important features of our setup are that it is robust against quenched disorder, all relevant operations can be performed by global variations of parameters, and the time required for communication between distant qubits approaches linear scaling with their distance. We demonstrate that our concept can be extended to an ensemble of qubits embedded in a two-dimensional network to allow for communication between all of them.