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Numerical methods for solving the Hartree-Fock equations of diatomic molecules I.

Författare och institution:
John C. Morrison (-); Scott Boyd (-); Luis Marsano (-); Bernard Bialecki (-); Thomas Ericsson (Institutionen för matematiska vetenskaper, matematik, Chalmers/GU); Jose Paulo Santos (-)
Publicerad i:
Communications in Computational Physics, 5 ( 5 ) s. 959-985
ISSN:
1815-2406
E-ISSN:
1991-7120
Publikationstyp:
Artikel, refereegranskad vetenskaplig
Publiceringsår:
2009
Språk:
engelska
Sammanfattning (abstract):
The theory of domain decomposition is described and used to divide the variable domain of a diatomic molecule into separate regions which are solved independently. This approach makes it possible to use fast Krylov methods in the broad interior of the region while using explicit methods such as Gaussian elimination on the boundaries. As is demonstrated by solving a number of model problems, these methods enable one to obtain solutions of the relevant partial differential equations and eigenvalue equations accurate to six significant figures with a small amount of computational time. Since the numerical approach described in this article decomposes the variable space into separate regions where the equations are solved independently, our approach is very well-suited to parallel computing and offers the long term possibility of studying complex molecules by dividing them into smaller fragments that are calculated separately.
Länk till sammanfattning (abstract):
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
NATURVETENSKAP ->
Matematik ->
Beräkningsmatematik ->
Tillämpad matematik ->
Numerisk analys
NATURVETENSKAP ->
Fysik ->
Atom- och molekylfysik och optik ->
Molekylfysik
Nyckelord:
Fast Krylov methods, splines, Hartree-Fock equations, diatomic molecules, eigenvalue problem.
Postens nummer:
103545
Posten skapad:
2009-12-14 17:04
Posten ändrad:
2016-08-17 13:48

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