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Single-photon-boosted type-I fusion gates

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arXiv:2603.27315v1 Announce Type: new Abstract: Fusion measurements are a key primitive for linear-optical quantum computing and quantum networks. Type-I and type-II fusion gates are widely used to combine small entangled resource states into larger photonic states, but without ancillary resources their success probability is limited to $1/2$. Existing $3/4$-efficient type-I schemes rely on entangled Bell-pair ancillary states, whose preparation is itself probabilistic and resource-intensive. He

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✦ AI Summary · Claude Sonnet

Quantum Physics [Submitted on 28 Mar 2026] Single-photon-boosted type-I fusion gates A. A. Melkozerov, S. S. Straupe, M. Yu. Saygin Fusion measurements are a key primitive for linear-optical quantum computing and quantum networks. Type-I and type-II fusion gates are widely used to combine small entangled resource states into larger photonic states, but without ancillary resources their success probability is limited to 1/2. Existing 3/4-efficient type-I schemes rely on entangled Bell-pair ancillary states, whose preparation is itself probabilistic and resource-intensive. Here we propose a boosted type-I fusion gate that achieves a total success probability of 3/4 using only four ancillary single photons and passive linear optics. The gate succeeds directly with probability 5/8, while a distillation step converts partially entangled outcomes into additional successful events. We quantify the practical advantage of this scheme by estimating the photonic resources required for generating representative large entangled photonic states and show that the proposed gate significantly reduces the required overhead. These results expand the set of resource-efficient linear-optical primitives and enable a substantial reduction in the resource requirements for scalable photonic quantum computing and quantum communication. Comments: 9 pages, 5 figures Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2603.27315 [quant-ph] (or arXiv:2603.27315v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2603.27315 Focus to learn more Submission history From: Aleksandr Melkozerov [view email] [v1] Sat, 28 Mar 2026 15:43:31 UTC (104 KB) Access Paper: HTML (experimental) view license Current browse context: quant-ph < prev | next > new | recent | 2026-03 References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar Export BibTeX Citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Demos Related Papers About arXivLabs Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)

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