Nonlinear photonic architecture for fault-tolerant quantum computing

Abstract:We propose a novel architecture for fault-tolerant quantum computing that incorporates strong single-photon nonlinearities into a photonic GHZ-measurement-based architecture. The nonlinearities substantially reduce resource overheads compared to conventional linear-optics-based architectures, which require significant redundancy to accommodate probabilistic photon generation and probabilistic entangling operations. By removing linear-optical failure modes, our nonlinear architecture can also tolerate much higher optical losses than linear approaches, with a baseline loss tolerance of $\sim$12\% using a 32-photon resource state and a foliated surface code. Nonlinear photonic architectures provide a route to dramatically improving practical implementations of fault-tolerant quantum computing.

arXiv:2510.06890 [quant-ph]

(or arXiv:2510.06890v2 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2510.06890 Focus to learn more arXiv-issued DOI via DataCite

https://doi.org/10.1103/s3dr-tsbg Focus to learn more DOI(s) linking to related resources

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