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Precise Neural Network Predictions of Energies and Radii from the No-core Shell Model by Wolfgruber, Tobias; Knöll, Marco; Roth, Robert is a scholarly article available to read on EtoBox.

What is Precise Neural Network Predictions of Energies and Radii from the No-core Shell Model about?

For light nuclei, ab initio many-body methods such as the no-core shell model are the tools of choice for predictive, high-precision nuclear structure calculations. The applicability and the level of precision of these methods, however, is limited by the model-space truncation that has to be employed to make such computations feasible. We present a universal framework based on artificial neural networks to predict the value of observables for an infinite model-space size based on finite-size no-core shell model data. Expanding upon our previous ansatz of training the neural networks to recognize the observable-specific convergence pattern with data from few-body nuclei, we improve the results obtained for ground-state energies and show a way to handle excitation energies within this framework. Furthermore, we extend the framework to the prediction of converged root-mean-square radii, which are more difficult due to the much less constrained convergence behavior. For all observables robust and statistically significant uncertainties are extracted via the sampling over a large number of network realizations and evaluation data samples.

Author

Wolfgruber, Tobias; Knöll, Marco; Roth, Robert

Published

2023

Language

EN