Deep learning: Extrapolation tool for ab initio nuclear theory
Abstract
Ab initio approaches in nuclear theory, such as the nocore shell model (NCSM), have been developed for approximately solving finite nuclei with realistic strong interactions. The NCSM and other approaches require an extrapolation of the results obtained in a finite basis space to the infinite basis space limit and assessment of the uncertainty of those extrapolations. Each observable requires a separate extrapolation and many observables have no proven extrapolation method. We propose a feedforward artificial neural network (ANN) method as an extrapolation tool to obtain the groundstate energy and the groundstate pointproton rootmeansquare (rms) radius along with their extrapolation uncertainties. The designed ANNs are sufficient to produce results for these two very different observables in ^{6}Li from the ab initio NCSM results in small basis spaces that satisfy the following theoretical physics condition: independence of basis space parameters in the limit of extremely large matrices. Comparisons of the ANN results with other extrapolation methods are also provided.
 Authors:

 Iowa State Univ., Ames, IA (United States). Dept. of Computer Science; Horia Hulubei National Inst. for Physics and Nuclear Engineering (Romania)
 Iowa State Univ., Ames, IA (United States). Dept. of Physics and Astronomy
 Iowa State Univ., Ames, IA (United States). Dept. of Mathematics
 Moscow State Univ., Moscow (Russian Federation). Skobeltsyn Inst. of Nuclear Physics; Pacific National Univ., Khabarovsk (Russia). Dept. of Physics
 Inst. for Basic Science, Daejeon (Korea). Rare Isotope Science Project
 Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
 Iowa State Univ., Ames, IA (United States). Dept. of Computer Science
 Publication Date:
 Research Org.:
 Lawrence Berkeley National LaboratoryNational Energy Research Scientific Computing Center (NERSC)
 Sponsoring Org.:
 USDOE Office of Science (SC)
 OSTI Identifier:
 1527179
 DOE Contract Number:
 FG0287ER40371; SC000018223; AC0205CH11231
 Resource Type:
 Journal Article
 Journal Name:
 Physical Review C
 Additional Journal Information:
 Journal Volume: 99; Journal Issue: 5; Journal ID: ISSN 24699985
 Publisher:
 American Physical Society (APS)
 Country of Publication:
 United States
 Language:
 English
Citation Formats
Negoita, Gianina Alina, Vary, James P., Luecke, Glenn R., Maris, Pieter, Shirokov, Andrey M., Shin, Ik Jae, Kim, Youngman, Ng, Esmond G., Yang, Chao, Lockner, Matthew, and Prabhu, Gurpur M. Deep learning: Extrapolation tool for ab initio nuclear theory. United States: N. p., 2019.
Web. doi:10.1103/PhysRevC.99.054308.
Negoita, Gianina Alina, Vary, James P., Luecke, Glenn R., Maris, Pieter, Shirokov, Andrey M., Shin, Ik Jae, Kim, Youngman, Ng, Esmond G., Yang, Chao, Lockner, Matthew, & Prabhu, Gurpur M. Deep learning: Extrapolation tool for ab initio nuclear theory. United States. doi:10.1103/PhysRevC.99.054308.
Negoita, Gianina Alina, Vary, James P., Luecke, Glenn R., Maris, Pieter, Shirokov, Andrey M., Shin, Ik Jae, Kim, Youngman, Ng, Esmond G., Yang, Chao, Lockner, Matthew, and Prabhu, Gurpur M. Wed .
"Deep learning: Extrapolation tool for ab initio nuclear theory". United States. doi:10.1103/PhysRevC.99.054308.
@article{osti_1527179,
title = {Deep learning: Extrapolation tool for ab initio nuclear theory},
author = {Negoita, Gianina Alina and Vary, James P. and Luecke, Glenn R. and Maris, Pieter and Shirokov, Andrey M. and Shin, Ik Jae and Kim, Youngman and Ng, Esmond G. and Yang, Chao and Lockner, Matthew and Prabhu, Gurpur M.},
abstractNote = {Ab initio approaches in nuclear theory, such as the nocore shell model (NCSM), have been developed for approximately solving finite nuclei with realistic strong interactions. The NCSM and other approaches require an extrapolation of the results obtained in a finite basis space to the infinite basis space limit and assessment of the uncertainty of those extrapolations. Each observable requires a separate extrapolation and many observables have no proven extrapolation method. We propose a feedforward artificial neural network (ANN) method as an extrapolation tool to obtain the groundstate energy and the groundstate pointproton rootmeansquare (rms) radius along with their extrapolation uncertainties. The designed ANNs are sufficient to produce results for these two very different observables in 6Li from the ab initio NCSM results in small basis spaces that satisfy the following theoretical physics condition: independence of basis space parameters in the limit of extremely large matrices. Comparisons of the ANN results with other extrapolation methods are also provided.},
doi = {10.1103/PhysRevC.99.054308},
journal = {Physical Review C},
issn = {24699985},
number = 5,
volume = 99,
place = {United States},
year = {2019},
month = {5}
}
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