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Accelerating Core-Level GW Calculations by Combining the Contour Deformation Approach with the Analytic Continuation of W
[Image: see text] In recent years, the GW method has emerged as a reliable tool for computing core-level binding energies. The contour deformation (CD) technique has been established as an efficient, scalable, and numerically stable approach to compute the GW self-energy for deep core excitations. H...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2023
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10448726/ https://www.ncbi.nlm.nih.gov/pubmed/37566917 http://dx.doi.org/10.1021/acs.jctc.3c00555 |
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author | Panadés-Barrueta, Ramón L. Golze, Dorothea |
author_facet | Panadés-Barrueta, Ramón L. Golze, Dorothea |
author_sort | Panadés-Barrueta, Ramón L. |
collection | PubMed |
description | [Image: see text] In recent years, the GW method has emerged as a reliable tool for computing core-level binding energies. The contour deformation (CD) technique has been established as an efficient, scalable, and numerically stable approach to compute the GW self-energy for deep core excitations. However, core-level GW calculations with CD face the challenge of higher scaling with respect to system size N compared to the conventional quartic scaling in valence-state algorithms. In this work, we present the CD-WAC method [CD with W analytic continuation (AC)], which reduces the scaling of CD applied to the inner shells from O(N(5)) to O(N(4)) by employing an AC of the screened Coulomb interaction W. Our proposed method retains the numerical accuracy of CD for the computationally challenging deep core case, yielding mean absolute errors <5 meV for well-established benchmark sets, such as CORE65, for single-shot GW calculations. More extensive testing for different GW flavors proves the reliability of the method. We have confirmed the theoretical scaling by performing scaling experiments on large acene chains and amorphous carbon clusters, achieving speedups of up to 10× for structures of only 116 atoms. This improvement in computational efficiency paves the way for more accurate and efficient core-level GW calculations on larger and more complex systems. |
format | Online Article Text |
id | pubmed-10448726 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-104487262023-08-25 Accelerating Core-Level GW Calculations by Combining the Contour Deformation Approach with the Analytic Continuation of W Panadés-Barrueta, Ramón L. Golze, Dorothea J Chem Theory Comput [Image: see text] In recent years, the GW method has emerged as a reliable tool for computing core-level binding energies. The contour deformation (CD) technique has been established as an efficient, scalable, and numerically stable approach to compute the GW self-energy for deep core excitations. However, core-level GW calculations with CD face the challenge of higher scaling with respect to system size N compared to the conventional quartic scaling in valence-state algorithms. In this work, we present the CD-WAC method [CD with W analytic continuation (AC)], which reduces the scaling of CD applied to the inner shells from O(N(5)) to O(N(4)) by employing an AC of the screened Coulomb interaction W. Our proposed method retains the numerical accuracy of CD for the computationally challenging deep core case, yielding mean absolute errors <5 meV for well-established benchmark sets, such as CORE65, for single-shot GW calculations. More extensive testing for different GW flavors proves the reliability of the method. We have confirmed the theoretical scaling by performing scaling experiments on large acene chains and amorphous carbon clusters, achieving speedups of up to 10× for structures of only 116 atoms. This improvement in computational efficiency paves the way for more accurate and efficient core-level GW calculations on larger and more complex systems. American Chemical Society 2023-08-11 /pmc/articles/PMC10448726/ /pubmed/37566917 http://dx.doi.org/10.1021/acs.jctc.3c00555 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Panadés-Barrueta, Ramón L. Golze, Dorothea Accelerating Core-Level GW Calculations by Combining the Contour Deformation Approach with the Analytic Continuation of W |
title | Accelerating Core-Level GW Calculations
by Combining the Contour Deformation Approach with the Analytic Continuation
of W |
title_full | Accelerating Core-Level GW Calculations
by Combining the Contour Deformation Approach with the Analytic Continuation
of W |
title_fullStr | Accelerating Core-Level GW Calculations
by Combining the Contour Deformation Approach with the Analytic Continuation
of W |
title_full_unstemmed | Accelerating Core-Level GW Calculations
by Combining the Contour Deformation Approach with the Analytic Continuation
of W |
title_short | Accelerating Core-Level GW Calculations
by Combining the Contour Deformation Approach with the Analytic Continuation
of W |
title_sort | accelerating core-level gw calculations
by combining the contour deformation approach with the analytic continuation
of w |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10448726/ https://www.ncbi.nlm.nih.gov/pubmed/37566917 http://dx.doi.org/10.1021/acs.jctc.3c00555 |
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