Toward emulating nuclear reactions using eigenvector continuation

We construct an efficient emulator for two-body scattering observables using the general (complex) Kohn variational principle and trial wave functions derived from eigenvector continuation. The emulator simultaneously evaluates an array of Kohn variational principles associated with different bounda...

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Autores principales:	C. Drischler, M. Quinonez, P.G. Giuliani, A.E. Lovell, F.M. Nunes
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/f4bbce30ab7d45b991881162283fdfd6
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spelling	oai:doaj.org-article:f4bbce30ab7d45b991881162283fdfd62021-12-04T04:32:43ZToward emulating nuclear reactions using eigenvector continuation0370-269310.1016/j.physletb.2021.136777https://doaj.org/article/f4bbce30ab7d45b991881162283fdfd62021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0370269321007176https://doaj.org/toc/0370-2693We construct an efficient emulator for two-body scattering observables using the general (complex) Kohn variational principle and trial wave functions derived from eigenvector continuation. The emulator simultaneously evaluates an array of Kohn variational principles associated with different boundary conditions, which allows for the detection and removal of spurious singularities known as Kohn anomalies. When applied to the K-matrix only, our emulator resembles the one constructed by Furnstahl et al. (2020) [29] although with reduced numerical noise. After a few applications to real potentials, we emulate differential cross sections for 40Ca(n,n) scattering based on a realistic optical potential and quantify the model uncertainties using Bayesian methods. These calculations serve as a proof of principle for future studies aimed at improving optical models.C. DrischlerM. QuinonezP.G. GiulianiA.E. LovellF.M. NunesElsevierarticlePhysicsQC1-999ENPhysics Letters B, Vol 823, Iss , Pp 136777- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 C. Drischler M. Quinonez P.G. Giuliani A.E. Lovell F.M. Nunes Toward emulating nuclear reactions using eigenvector continuation
description	We construct an efficient emulator for two-body scattering observables using the general (complex) Kohn variational principle and trial wave functions derived from eigenvector continuation. The emulator simultaneously evaluates an array of Kohn variational principles associated with different boundary conditions, which allows for the detection and removal of spurious singularities known as Kohn anomalies. When applied to the K-matrix only, our emulator resembles the one constructed by Furnstahl et al. (2020) [29] although with reduced numerical noise. After a few applications to real potentials, we emulate differential cross sections for 40Ca(n,n) scattering based on a realistic optical potential and quantify the model uncertainties using Bayesian methods. These calculations serve as a proof of principle for future studies aimed at improving optical models.
format	article
author	C. Drischler M. Quinonez P.G. Giuliani A.E. Lovell F.M. Nunes
author_facet	C. Drischler M. Quinonez P.G. Giuliani A.E. Lovell F.M. Nunes
author_sort	C. Drischler
title	Toward emulating nuclear reactions using eigenvector continuation
title_short	Toward emulating nuclear reactions using eigenvector continuation
title_full	Toward emulating nuclear reactions using eigenvector continuation
title_fullStr	Toward emulating nuclear reactions using eigenvector continuation
title_full_unstemmed	Toward emulating nuclear reactions using eigenvector continuation
title_sort	toward emulating nuclear reactions using eigenvector continuation
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/f4bbce30ab7d45b991881162283fdfd6
work_keys_str_mv	AT cdrischler towardemulatingnuclearreactionsusingeigenvectorcontinuation AT mquinonez towardemulatingnuclearreactionsusingeigenvectorcontinuation AT pggiuliani towardemulatingnuclearreactionsusingeigenvectorcontinuation AT aelovell towardemulatingnuclearreactionsusingeigenvectorcontinuation AT fmnunes towardemulatingnuclearreactionsusingeigenvectorcontinuation
_version_	1718373066185113600

Toward emulating nuclear reactions using eigenvector continuation

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