Quantum Theory of Many-Body Systems: Techniques and Applications

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Springer, Jun 26, 2014 - Technology & Engineering - 280 pages

This text presents a self-contained treatment of the physics of many-body systems from the point of view of condensed matter. The approach, quite traditionally, uses the mathematical formalism of quasiparticles and Green’s functions. In particular, it covers all the important diagram techniques for normal and superconducting systems, including the zero-temperature perturbation theory and the Matsubara, Keldysh and Nambu-Gor'kov formalism, as well as an introduction to Feynman path integrals.

This new edition contains an introduction to the methods of theory of one-dimensional systems (bosonization and conformal field theory) and their applications to many-body problems.

Intended for graduate students in physics and related fields, the aim is not to be exhaustive, but to present enough detail to enable the student to follow the current research literature, or to apply the techniques to new problems. Many of the examples are drawn from mesoscopic physics, which deals with systems small enough that quantum coherence is maintained throughout their volume and which therefore provides an ideal testing ground for many-body theories.

 

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Contents

1 Basic Concepts
1
2 Greens Functions at Zero Temperature
53
3 More Greens Functions Equilibrium and Otherwise and Their Applications
101
4 Methods of the ManyBody Theory in Superconductivity
157
5 ManyBody Theory in One Dimension
226
Appendix AFriedel Oscillations
263
Appendix BLandauer Formalism for HybridNormalSuperconducting Structures
267
Index
276
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About the author (2014)

Alexandre Zagoskin is Reader in Quantum Physics in the Department of Physics at Loughborough University. In his career, he has published over 90 articles in refereed journals, 2 books (including the first edition of Quantum Theory of Many-Body Systems [Springer, 978-0-387-98384-4, 1998]), and 23 patents. He is Fellow of the Institute of Physics (FInstP) UK.

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