Nonequilibrium Many-Body Theory of Quantum Systems

Nonequilibrium Many-Body Theory of Quantum Systems

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A Modern Introduction

Cambridge University Press, 2013, 620 Seiten, Format: 17,4x24,7x3,2 cm, Artikeltyp: Englisches Buch, ISBN-10: 0521766176, EAN: 9780521766173, Bestell-Nr: 52176617EA

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A pedagogical introduction to nonequilibrium theory, time-dependent phenomena and excited state properties, for graduate students and researchers.


The Green's function method is one of the most powerful and versatile formalisms in physics, and its nonequilibrium version has proved invaluable in many research fields. This book provides a unique, self-contained introduction to nonequilibrium many-body theory. Starting with basic quantum mechanics, the authors introduce the equilibrium and nonequilibrium Green's function formalisms within a unified framework called the contour formalism. The physical content of the contour Green's functions and the diagrammatic expansions are explained with a focus on the time-dependent aspect. Every result is derived step-by-step, critically discussed and then applied to different physical systems, ranging from molecules and nanostructures to metals and insulators. With an abundance of illustrative examples, this accessible book is ideal for graduate students and researchers who are interested in excited state properties of matter and nonequilibrium physics.


Preface; 1. Second quantization; 2. Getting familiar with second quantization: model Hamiltonians; 3. Time-dependent problems and equations of motion; 4. The contour idea; 5. Many-particle Green's functions; 6. One-particle Green's function; 7. Mean field approximations; 8. Conserving approximations: two-particle Green's function; 9. Conserving approximations: self-energy; 10. MBPT for the Green's function; 11. MBPT and variational principles for the grand potential; 12. MBPT for the two-particle Green's function; 13. Applications of MBPT to equilibrium problems; 14. Linear response theory: preliminaries; 15. Linear response theory: many-body formulation; 16. Applications of MBPT to nonequilibrium problems; Appendices; Index.


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