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Perturbation Theory

Supplementary subject: Quantum ChemistryPerturbation theory6 lectures, (Tuesday and Friday, weeks 4-6 of Hilary term)Chris-Kriton Skylaris( @ )Physical & Theoretical Chemistry LaboratorySouth Parks Road, OxfordFebruary 24, 2006 BibliographyAll the material required is covered in Molecular Quantum Mechanics fourth editionby Peter Atkins and Ronald Friedman (OUP 2005). Specifically, Chapter 6, first half ofChapter 12 and Section reading: Quantum Chemistry fourth edition by Ira N. Levine (Prentice Hall 1991). Quantum Mechanics by F. Mandl (Wiley 1992). Quantum Physics third edition by Stephen Gasiorowicz (Wiley 2003). Modern Quantum Mechanics revised edition by J. J. Sakurai (Addison Wesley Long-man 1994). Modern Quantum Chemistry by A. Szabo and N. S. Ostlund (Dover 1996).1 Contents1 Introduction22 Time-independent Perturbation Non-degeneratesystems .. Thefirstordercorrectiontothewavefunction .

Perturbation theory is often more complicated than variation theory but also its scope is broader as it applies to any excited state of a system while variation theory is usually restricted to the ground state. We will begin by developing perturbation theory for stationary states resulting from

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