Nonlinear photonic architecture for fault-tolerant quantum computing
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866918156464816128 |
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| author | Ostmann, Maike Nunn, Joshua Jones, Alex E. |
| author_facet | Ostmann, Maike Nunn, Joshua Jones, Alex E. |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_06890 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Nonlinear photonic architecture for fault-tolerant quantum computing Ostmann, Maike Nunn, Joshua Jones, Alex E. Quantum Physics 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. |
| title | Nonlinear photonic architecture for fault-tolerant quantum computing |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2510.06890 |