Reduced basis emulator for elastic scattering in continuum-discretized coupled-channels calculations

[2512.17687] Reduced basis emulator for elastic scattering in continuum-discretized coupled-channels calculations Skip to main content Search Submit Donate Log in Nuclear Theory arXiv:2512.17687 (nucl-th) [Submitted on 19 Dec 2025 ( v1 ), last revised 27 Aug 2026 (this version, v2)] Title: Reduced basis emulator for elastic scattering in continuum-discretized coupled-channels calculations Authors: Jin Lei View PDF HTML (experimental) Abstract: I develop a reduced basis emulator for continuum-discretized coupled-channel (CDCC) calculations that achieves speedups of $\approx 10^2$ while maintaining sub-percent accuracy. The emulator is constructed using the proper orthogonal decomposition (POD) method applied to snapshots of CDCC solutions computed at sampled points in the optical potential parameter space. The prediction is performed via Galerkin projection onto the reduced basis. I demonstrate the method using deuteron scattering on $^{58}$Ni at 21.6 MeV as a test case, emulating 18 optical potential parameters simultaneously. The emulator reproduces elastic scattering cross sections with errors below 0.1% across a wide parameter range. This development enables efficient uncertainty quantification and Bayesian parameter estimation for nuclear reaction calculations that were previously computationally prohibitive. Comments: 12 pages, 7 figures. Published version Subjects: Nuclear Theory (nucl-th) Cite as: arXiv:2512.17687 [nucl-th] (or arXiv:2512.17687v2 [nucl-th] for this version) https://doi.org/10.48550/arXiv.2512.17687 Focus to learn more arXiv-issued DOI via DataCite Journal reference: Phys. Rev. C 113, 044610 (2026) Related DOI : https://doi.org/10.1103/n24x-d9gm Focus to learn more DOI(s) linking to related resources Submission history From: Jin Lei [ view email ] [v1] Fri, 19 Dec 2025 15:22:00 UTC (302 KB) [v2] Thu, 27 Aug 2026 02:39:42 UTC (313 KB) Full-text links: Access Paper: View PDF HTML (experimental) TeX Source view license Current browse context: nucl-th < prev | next > new | recent | 2025-12 References & Citations INSPIRE HEP SciX 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 Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv ( What is alphaXiv? ) Links to Code Toggle CatalyzeX Code Finder for Papers ( What is CatalyzeX? ) DagsHub Toggle DagsHub ( What is DagsHub? ) GotitPub Toggle Gotit.pub ( What is GotitPub? ) Huggingface Toggle Hugging Face ( What is Huggingface? ) ScienceCast Toggle ScienceCast ( What is ScienceCast? ) Demos Demos Replicate Toggle Replicate ( What is Replicate? ) Spaces Toggle Hugging Face Spaces ( What is Spaces? ) Spaces Toggle TXYZ.AI ( What is TXYZ.AI? ) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower ( What are Influence Flowers? ) Core recommender toggle CORE Recommender ( What is CORE? ) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs . Which authors of this paper are endorsers? | Disable MathJax ( What is MathJax? ) We gratefully acknowledge support from our major funders , member institutions , and all contributors. About · Help · Contact · Subscribe · Copyright · Privacy · Accessibility · Operational Status (opens in new tab)

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