我們提出了「透過偵測真正的 N 節點 Einstein-Podolsky-Rosen 量子可操縱性」來實現量子網路的保真度和真正的多節點糾纏的確認，並且在不受信任的星形網路中，確定量子網路保真度和真正的 N 節點糾纏僅需要 N+1 組測量。實驗上，我們使用光學裝置演示了真正的 3 光子和 4 光子量子網路的確認，以及廣泛使用的糾纏目擊的誤報，即 1/2 的保真度標準。我們期望透過進一步的研究，該方法可以擴展到其他類型的網路拓撲以適用於通用的量子網路。

有關該研究與成果的更多參考資料及資訊，請參閱：
(1)Research中「實驗糾纏光子與多光子糾纏的產生與識別」的介紹：http://cmli.es.ncku.edu.tw/?page_id=18
(2)npj Quantum Information期刊刊載頁面：https://doi.org/10.1038/s41534-024-00867-0
(3)npj Quantum Information期刊論文全文：https://rdcu.be/dQl58

Our results provide a network determination method to determine quantum network fidelity and genuine multi-node entanglement, which is enabled by detecting genuine N-node Einstein-Podolsky-Rosen steerability, and such determination in an untrusted star network requires only N + 1 measurement settings. Experimentally, we use optical setups to demonstrate the determinations of genuine 3-photon and 4-photon quantum networks and the false positives of the widely used entanglement witness with the fidelity criterion of 1/2. We expect our method could be extended to other types of network topology for generic quantum internet with further studies.

For more information and reference, please visit:
(1)Section of “Scalable determination of multipartite entanglement in quantum networks” in our Research page: http://cmli.es.ncku.edu.tw/?page_id=18
(2)Our article online npj Quantum Information: https://doi.org/10.1038/s41534-024-00867-0
(3)Full-text open access to our paper: https://rdcu.be/dQl58