Quantum secret sharing in a triangular superconducting quantum network

TL;DR

This paper demonstrates a three-node superconducting quantum network capable of secure quantum secret sharing, entanglement distribution, and eavesdropping detection, serving as a testbed for advanced quantum communication protocols.

Contribution

It introduces a novel triangular superconducting quantum network that enables secure quantum secret sharing and multipartite entanglement generation.

Findings

Successful state transfer and entanglement between nodes

Generation of genuine multipartite GHZ states

Effective eavesdropping detection in QSS protocol

Abstract

We present a three-node quantum communication testbed with a triangular topology, each side of the triangle formed by a 1.3-meter-long transmission line. We demonstrate state transfer and entanglement generation between any two nodes, generate genuine multipartite entangled GHZ states, and implement quantum secret sharing (QSS) of classical information. Our experiments show that the QSS protocol can effectively detect eavesdropping, ensuring the secure sharing of secrets. This device forms a testbed for robust and secure quantum networking, enabling testing of more advanced quantum communication protocols.