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- W4309622036 abstract "We present the reduced basis method as a tool for developing emulators for equations with tunable parameters within the context of the nuclear many-body problem. The method uses a basis expansion informed by a set of solutions for a few values of the model parameters and then projects the equations over a well-chosen low-dimensional subspace. We connect some of the results in the eigenvector continuation literature to the formalism of reduced basis methods and show how these methods can be applied to a broad set of problems. As we illustrate, the possible success of the formalism on such problems can be diagnosed beforehand by a principal component analysis. We apply the reduced basis method to the one-dimensional Gross-Pitaevskii equation with a harmonic trapping potential and to nuclear density functional theory for $^{48}mathrm{Ca}$, achieving speed-ups of more than $ifmmodetimeselsetexttimesfi{}150$ and $ifmmodetimeselsetexttimesfi{}250$, respectively, when compared to traditional solvers. The outstanding performance of the approach, together with its straightforward implementation, show promise for its application to the emulation of computationally demanding calculations, including uncertainty quantification." @default.
- W4309622036 created "2022-11-28" @default.
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- W4309622036 date "2022-11-17" @default.
- W4309622036 modified "2023-10-18" @default.
- W4309622036 title "Training and projecting: A reduced basis method emulator for many-body physics" @default.
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- W4309622036 doi "https://doi.org/10.1103/physrevc.106.054322" @default.
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