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    Generation of scalable genuine multipartite Gaussian entanglement with a parametric amplifier network

    Saesun Kim1,2,*, Sho Onoe3,4, and Alberto M. Marino1,2,5,6,†

    • *Contact author: saesun.kim@keysight.com
    • †Contact author: marino@ou.edu, marinoa@ornl.gov

    Phys. Rev. A 113, 012401 – Published 2 January, 2026

    DOI: https://doi.org/10.1103/wdcl-bnz4

    Abstract

    Genuine multipartite entanglement is a valuable resource in quantum information science, as it exhibits inseparability across all possible bipartitions of a multimode quantum state. The large degree of quantum correlations can be exploited in various quantum information protocols, such as teleportation, dense coding, and quantum interferometry. Here, we propose a scheme to generate scalable genuine multipartite continuous-variable entangled states of light using a parametric amplifier network. We verify the presence of genuine quadripartite, hexapartite, and octapartite entanglement through a violation of the positive partial transpose criteria. Additionally, we use α-entanglement of formation to demonstrate the scalability of our approach to an arbitrary number of 2N genuinely entangled parties by taking advantage of the symmetries present in our scheme.

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