All-Photonic Quantum Repeater for Multipartite Entanglement Generation

TL;DR

This paper proposes an all-photonic quantum repeater protocol for generating multipartite entanglement over long distances, addressing a key challenge in scalable quantum networks with improved efficiency and user extension capabilities.

Contribution

It introduces a novel two-dimensional quantum repeater protocol specifically designed for multipartite entanglement distribution in quantum networks.

Findings

Achieves long-distance multipartite entanglement distribution

Demonstrates improved efficiency over existing methods

Supports flexible scaling with more network users

Abstract

Quantum network applications like distributed quantum computing and quantum secret sharing present a promising future network equipped with quantum resources. Entanglement generation and distribution over long distances is critical and unavoidable to utilize quantum technology in a fully-connected network. The distribution of bipartite entanglement over long distances has seen some progresses, while the distribution of multipartite entanglement over long distances remains unsolved. Here we report a two-dimensional quantum repeater protocol for the generation of multipartite entanglement over long distances with all-photonic framework to fill this gap. The yield of the proposed protocol shows long transmission distance under various numbers of network users. With the improved efficiency and flexibility of extending the number of users, we anticipate that our protocol can work as a significant building block for quantum networks in the future.