Spectral variational principle for Green's functions
dc.contributor.author | Blinder, S. M. | en_US |
dc.date.accessioned | 2006-09-11T17:48:01Z | |
dc.date.available | 2006-09-11T17:48:01Z | |
dc.date.issued | 1972-12 | en_US |
dc.identifier.citation | Blinder, S. M.; (1972). "Spectral variational principle for Green's functions." Theoretica Chimica Acta 24(4): 382-388. <http://hdl.handle.net/2027.42/46453> | en_US |
dc.identifier.issn | 0040-5744 | en_US |
dc.identifier.issn | 1432-2234 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/46453 | |
dc.description.abstract | For a suitable approximation ( q, q′, τ ) to the Dirac-Feynman Green's function of a quantummechanical system, the parameter is defined, where ℒ≡ i ∂/∂τ−ℋ. It is shown that Δ ≧0 and Δ →0 as K→K , the exact Green's function, thus providing a criterion on approximate Green's functions analogous in its role to the variational principle for wavefunctions. A second somewhat weaker criterion is also proposed, based on . Recipes are given for projecting out continuum contributions to Δ or ∑ and for analyzing for the discrete eigen-value spectrum. Um zu Näherungen ( q, q′, τ) für die Dirac-Feynman-Greensche Funktion eines quantenmechanischen Systems zu gelangen, wird der Parameter definiert, wobei ℒ≡ i ∂/∂τ−ℋ für iδ/δτ — ℋ steht. Es wird gezeigt, daß Δ ≧0 und Δ →0 wenn K→K , so daß damit ein Kriterium für Näherungen der Green'schen Funktion analog dem Variationsprinzip für Wellenfunktionen gefunden ist. Als zweites, wenn auch schwächeres Kriterium gründet sich auf . Hinweise für das Herausprojizieren der Beträge des Kontinuums aus Δ bzw. ∑ und für die Analyse des diskreten Spektrums werden gegeben. | en_US |
dc.format.extent | 316704 bytes | |
dc.format.extent | 3115 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Springer-Verlag | en_US |
dc.subject.other | Organic Chemistry | en_US |
dc.subject.other | Chemistry | en_US |
dc.subject.other | Inorganic Chemistry | en_US |
dc.subject.other | Physical Chemistry | en_US |
dc.subject.other | Theoretical and Computational Chemistry | en_US |
dc.title | Spectral variational principle for Green's functions | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Materials Science and Engineering | en_US |
dc.subject.hlbsecondlevel | Chemistry | en_US |
dc.subject.hlbsecondlevel | Chemical Engineering | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.subject.hlbtoplevel | Engineering | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Centre de Mécanique Ondulatoire Appliquée, 23 rue du Maroc, Paris 19e, France; Mathematical Institute, University of Oxford, 24-29 St Giles, OX1 3LB, Oxford, Great Britain; Department of Chemistry, University of Michigan, 48104, Ann Arbor, Michigan | en_US |
dc.contributor.affiliationumcampus | Ann Arbor | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/46453/1/214_2004_Article_BF01007554.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1007/BF01007554 | en_US |
dc.identifier.source | Theoretica Chimica Acta | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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