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BUQEYE Guide to Projection-Based Emulators in Nuclear Physics

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arxiv 2212.04912 v1 pith:V4K3P23Y submitted 2022-12-09 nucl-th hep-lathep-phphysics.data-an

C. Drischler , J.A. Melendez , R.J. Furnstahl , A.J. Garcia , Xilin Zhang This is my paper · ORCID
classification nucl-thhep-lathep-phphysics.data-an
keywords emulatorsnuclearphysicsmodelprojection-basedapplicationsbuqeyefast
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The BUQEYE collaboration (Bayesian Uncertainty Quantification: Errors in Your EFT) 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 & 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.

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Cited by 2 Pith papers

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  1. PMM-IMSRG emulator for the nuclear equation of state with quantified uncertainties

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    A parametric-matrix-model emulator reproduces IMSRG nuclear-matter energies with calibrated conformal-prediction error bars, enabling Bayesian fitting of three-nucleon couplings to saturation properties.

  2. Constraining Hamiltonians from chiral effective field theory with neutron-star data

    nucl-th 2026-01 conditional novelty 6.0 of 10

    Neutron-star data, run through fast emulators, directly constrain the six two-nucleon low-energy constants of an N2LO chiral Hamiltonian, with future detectors able to strongly pin down the 3P1 channel.

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