Zamastil / Uhlírová

An Algebraic Approach to the Many-Electron Problem

Springer International Publishing

ISBN 978-3-031-87825-1

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Bibliografische Daten

eBook. PDF

2025

VIII, 71 p..

In englischer Sprache

Umfang: 71 S.

Verlag: Springer International Publishing

ISBN: 978-3-031-87825-1

Weiterführende bibliografische Daten

Das Werk ist Teil der Reihe: SpringerBriefs in Physics

auch verfügbar als Buch (Softcover) für 48,14 €

Produktbeschreibung

This book presents an algebraic approach to the coupled cluster method for many-electron systems, pioneered by Josef Paldus. Using field methods along with an algebraic, rather than diagrammatic, approach facilitates a way of deriving the coupled cluster method which is readily understandable at the graduate level. The book begins with the notion of the quantized electron field and shows how the N-electron Hamiltonian can be expressed in its language. This is followed by introduction of the Fermi vacuum and derivation of the Hartree-Fock equations along with conditions for stability of their solutions. Following this groundwork, the book discusses a method of configuration interaction to account for dynamical correlations between electrons, pointing out the size-extensivity problem, and showing how this problem is solved with the coupled cluster approach. This is followed by derivation of the coupled cluster equations in spin-orbital form. Finally, the book explores practical aspects, showing how one may take advantage of permutational and spin symmetries, and how to solve coupled-cluster equations, illustrated by the Hubbard model of benzene, the simplest quasi-realistic model of electron correlation.

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