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

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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 continuousvariable 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 á-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.

Original languageEnglish
Article number012401
Pages (from-to)1-16
Number of pages16
JournalPhysical Review A
Volume113
Issue number1
DOIs
StatePublished - Jan 2 2026
Externally publishedYes

Funding

This work was supported by the National Science Foundation (NSF Grant No. PHYS-1752938). A.M.M. acknowledges support from the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Quantum Science Center for finalizing the manuscript. This work has been coauthored by employeess of UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy (DOE). The publisher acknowledges the U.S. government license to provide public access under the DOE Public Access Plan

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