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Quantum field theoretical methods in chemically bonded systems II

Diagrammatic perturbation theory

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Summary

Many-body perturbation theory is derived for chemical bonds. Paired quasiparticles represent the bonds. Products of the paired quasiparticles define a model Bardeen-Cooper-Schrieffer function. The pairing force is added as a model interaction to the self-consistent problem. The starting model is based on valency and adiabatic symmetry correlation. Symmetries are enforced by the model Hamiltonian. Perturbative corrections are expressed as ordinary Feynman diagrams. The number of diagrams needed is the same as for particle-hole theory.

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Authors and Affiliations

  1. Department of Chemistry and Laboratory for Surface Studies, University of Wisconsin-Milwaukee, 53201, Milwaukee, WI, USA

    Thomas E. Sorensen & Walter B. England

  2. Applied Physics Laboratory, Johns Hopkins University, 20723, Laurel, MD, USA

    David M. Silver

  3. Institut für Physikalische und Theoretische Chemie, Universität Regensburg, W-8400, Regensburg, Germany

    E. Otto Steinborn

Authors
  1. Thomas E. Sorensen
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  2. Walter B. England
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  3. David M. Silver
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  4. E. Otto Steinborn
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Additional information

This work was supported in part by the U.S. Department of the Navy, Space and Naval Warfare Systems Command under Contract N00039-89-C-0001, and in part by NATO Research Grant 1861. It was presented, in part, at the A.C. Wahl Memorial Session, Molecular Spectroscopy Symposium, Columbus, Ohio, 1984; and Midwest Theoretical Chemistry Conference, Milwaukee, Wisconsin, 1985.

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Sorensen, T.E., England, W.B., Silver, D.M. et al. Quantum field theoretical methods in chemically bonded systems II. Theoret. Chim. Acta 84, 1–19 (1992). https://doi.org/10.1007/BF01117400

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  • DOI: https://doi.org/10.1007/BF01117400

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