Many-Body Methods for Atoms, Molecules and Clusters

Paperback Engels 2018 9783030066918
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Samenvatting

This book provides an introduction to many-body methods for applications in quantum chemistry. These methods, originating in field-theory, offer an alternative to conventional quantum-chemical approaches to the treatment of the many-electron problem in molecules. Starting with a general introduction to the atomic and molecular many-electron problem, the book then develops a stringent formalism of field-theoretical many-body theory, culminating in the diagrammatic perturbation expansions of many-body Green's functions or propagators in terms of Feynman diagrams. It also introduces and analyzes practical computational methods, such as the field-tested algebraic-diagrammatic construction (ADC) schemes. The ADC concept can also be established via a wave-function based procedure, referred to as intermediate state representation (ISR), which bridges the gap between propagator and wave-function formulations. Based on the current rapid increase in computer power and the development of efficient computational methods, quantum chemistry has emerged as a potent theoretical tool for treating ever-larger molecules and problems of chemical and physical interest. Offering an introduction to many-body methods, this book appeals to advanced students interested in an alternative approach to the many-electron problem in molecules, and is suitable for any courses dealing with computational methods in quantum chemistry.

Specificaties

ISBN13:9783030066918
Taal:Engels
Bindwijze:paperback
Uitgever:Springer International Publishing

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Inhoudsopgave

I. Many-Electron Systems and the Electron Propagator<div>1. Systems of identical particles&nbsp;</div><div>2. Second quantization&nbsp;</div><div>3. One-particle Green’s function&nbsp;</div><div>II. Formalism of Diagrammatic Perturbation Theory&nbsp;</div><div>4. Perturbation theory for the electron propagator&nbsp;</div><div>5. Introducing diagrams&nbsp;</div><div>6. Feynman diagrams&nbsp;</div><div>7. Time-ordered or Goldstone diagrams</div><div>III. Approximations and Computational Schemes&nbsp;</div><div>8. Self-energy and the Dyson equation&nbsp;</div><div>9. Algebraic-diagrammatic construction (ADC)&nbsp;</div><div>10. Direct ADC procedure for the electron propagator&nbsp;</div><div>11. Intermediate-state representation (ISR)&nbsp;</div><div>12. Order relations and separability&nbsp;</div><div>IV. N-Electron Excitations&nbsp;</div><div>13. Polarization propagator &nbsp;</div><div>14. ADC and ISR approaches to the polarization propagator&nbsp;</div><div>15. Random-phase approximation (RPA)&nbsp;</div><div>V. A Look at Related Methods&nbsp;</div><div>16. Algebraic propagator methods</div><div>17. Coupled-cluster methods for generalized excitations&nbsp;</div><div>Appendix&nbsp;</div><div>A1 Basic tools&nbsp;</div><div>A2 Proof of the Gell-Mann and Low theorem&nbsp;</div><div>A3 Proof of Wick’s theorem&nbsp;</div><div>A4 Time-ordered diagrams: derivation of Goldstone rules&nbsp;</div><div>A5 Dyson expansion method for the static self-energy part&nbsp;</div><div>A6 Proofs of order relations&nbsp;</div><div>A7 Linear response theory and the polarization propagator&nbsp;</div><div>A8 Superoperator approach to the electron propagator&nbsp;</div><div>A9 Compilation of ADC expressions&nbsp;</div>

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        Many-Body Methods for Atoms, Molecules and Clusters