BUQEYE guide to projection-based emulators in nuclear physics
BUQEYE guide to projection-based emulators in nuclear physics
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DOI：
10.3389/fphy.2022.1092931
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发表时间：
2022-12
期刊：
影响因子：
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通讯作者：
C. Drischler;J. Melendez;R. Furnstahl;A. García;Xilin Zhang;Drischler;Furnstahl Garcia Melendez
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作者：
C. Drischler;J. Melendez;R. Furnstahl;A. García;Xilin Zhang;Drischler;Furnstahl Garcia Melendez
BUQEYE合作（贝叶斯不确定性量化：有效场论中的错误）介绍了基于投影的降阶仿真器在低能核物理中的应用。术语仿真器在这里指的是能够可靠地近似高保真模型的快速代理模型。由于这些仿真器所采用的通用工具在核物理界还不为人所知，我们讨论变分和Galerkin投影方法，强调离线-在线分解的好处，并探讨这些概念如何导致仿真器的约束和散射系统，使快速和准确的计算使用许多不同的模型参数集。我们还指出，未来的扩展和应用程序，这些仿真器的核物理，指导下的成熟领域的模型（阶）减少。这里讨论的所有示例以及更多示例都可以作为交互式开源Python代码使用，以便从业者可以轻松地将基于投影的模拟器用于自己的工作。
The BUQEYE collaboration (Bayesian Uncertainty Quantification: Errors in Your effective field theory) presents a pedagogical introduction to projection-based, reduced-order emulators for applications in low-energy nuclear physics. The term emulator refers here to a fast surrogate model capable of reliably approximating high-fidelity models. As the general tools employed by these emulators are not yet well-known in the nuclear physics community, we discuss variational and Galerkin projection methods, emphasize the benefits of offline-online decompositions, and explore how these concepts lead to emulators for bound and scattering systems that enable fast and accurate calculations using many different model parameter sets. We also point to future extensions and applications of these emulators for nuclear physics, guided by the mature field of model (order) reduction. All examples discussed here and more are available as interactive, open-source Python code so that practitioners can readily adapt projection-based emulators for their own work.