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Development of many...
Development of many-body perturbation theory
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- Lindgren, Ingvar, 1931 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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(creator_code:org_t)
- 2010
- 2010
- Engelska.
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Ingår i: MOLECULAR PHYSICS. - 0026-8976. ; 108:21-23, s. 2853-2861
- Relaterad länk:
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https://gup.ub.gu.se...
Abstract
Ämnesord
Stäng
- The development of standard MBPT for single-reference and multi-reference cases is reviewed, and its extension to the relativistic case in the form of the Dirac–Coulomb–Breit (DCB) approximation is described. The latter scheme is non-covariant, and the recent development of a fully covariant MBPT scheme is discussed. This is based upon a new scheme for quantum-electrodynamical (QED) calculations, the covariant-evolution-operator method, which is combined with standard MBPT. This scheme is fully compatible with the relativistically covariant Bethe–Salpeter equation. Some numerical results of the new scheme are given.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- helium-like-systems
- numerical-solution
- electron atoms
- states
- expansion
- equation
- ions
- li
- la
Publikations- och innehållstyp
- ref (ämneskategori)
- for (ämneskategori)
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