{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/a-high-performance-code-for-eprl-spin-foam","title":"A high-performance code for EPRL spin foam amplitudes","arxiv_id":"2107.13952","date":"2021-07-29","proceeding":null,"authors":["Francesco Gozzini"],"abstract":"We present $\\mathtt{\\text{sl2cfoam-next}}$, a high-performance software library for computing Lorentzian EPRL spin foam amplitudes. The library improves on previous codes by many orders of magnitude in single-core performance, can be parallelized on a large number of CPUs and on the GPU, and can be used interactively. We describe the techniques used in the code and provide many usage examples. As first applications, we use $\\mathtt{\\text{sl2cfoam-next}}$ to complete the numerical test of the Lorentzian single-vertex asymptotics and to confirm the presence of the \"flatness problem\" of spin foam models in the BF and EPRL cases.","url_abs":"https://arxiv.org/abs/2107.13952v1","url_pdf":"https://arxiv.org/pdf/2107.13952v1.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"a-high-performance-code-for-eprl-spin-foam","repo_url":"https://github.com/qg-cpt-marseille/sl2cfoam-next","is_official":1,"mentioned_in_paper":1,"mentioned_in_github":0,"framework":"none","reach":null},{"paper_slug":"a-high-performance-code-for-eprl-spin-foam","repo_url":"https://github.com/pietropaolofrisoni/howtospinfoamamplitude","is_official":0,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}