实验制备高维多光子纠缠态保真度达91%

Core Viewpoint - The research team led by Guo Guangcan from the University of Science and Technology of China has successfully achieved the preparation of high-fidelity high-dimensional multipartite entangled states and observed the existence of genuine high-dimensional non-locality for the first time, marking a significant advancement in quantum information science [1][2]. Group 1: Research Achievements - The team developed a method for preparing high-dimensional multipartite entangled states based on the principle of "path indistinguishability," which encodes three-dimensional quantum states using the path degree of freedom of photons [2]. - The experiment successfully created a Greenberger-Horne-Zeilinger (GHZ) state of three-photon three-dimensional multipartite entanglement with a fidelity of 91%, setting a new record for high-dimensional multipartite entangled states [2]. - The research established a new Bell inequality testing paradigm, experimentally confirming quantum correlations that exceed the theoretical limits of qubit systems, thus providing a solid foundation for non-locality detection [2]. Group 2: Implications and Applications - This breakthrough fills a gap in the international experimental research field of high-dimensional multipartite quantum non-locality and deepens the understanding of the nature of quantum entanglement [2]. - The findings provide critical technological support for constructing scalable, high-capacity, and noise-resistant quantum information processing systems [2]. - High-dimensional multipartite entangled states are expected to have broad application prospects in cutting-edge fields such as quantum communication, quantum computing, and quantum precision measurement [2].