Nonlinear photonic architecture for fault-tolerant quantum computing

• URL: http://arxiv.org/abs/2510.06890v1
• Date: Wed, 08 Oct 2025 11:13:04 GMT
• Title: Nonlinear photonic architecture for fault-tolerant quantum computing
• Abstract summary: We propose a novel architecture for fault-tolerant quantum computing that incorporates strong single-photon nonlinearities into a photonic GHZ-measurement-based architecture.<n>Our results show how introducing a nonlinear primitive enables dramatic improvements in practical implementations of fault-tolerant quantum computing.
• Score: 0.2676349883103404
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• 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. Our results show how introducing a nonlinear primitive enables dramatic improvements in practical implementations of fault-tolerant quantum computing.

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