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Full Description
This book provides an introduction to the methods of coupled quantum statistical field theory and Green's functions. The methods of coupled quantum field theory have played a major role in the extensive development of nonrelativistic quantum many-particle theory and condensed matter physics. This introduction to the subject is intended to facilitate delivery of the material in an easily digestible form to advanced undergraduate physics majors at a relatively early stage of their scientific development. The main mechanism to accomplish this is the early introduction of variational calculus and the Schwinger Action Principle, accompanied by Green's functions. Important achievements of the theory in condensed matter and quantum statistical physics are reviewed in detail to help develop research capability. These include the derivation of coupled field Green's function equations-of-motion for a model electron-hole-phonon system, extensive discussions of retarded, thermodynamic and nonequilibrium Green's functions and their associated spectral representations and approximation procedures. Phenomenology emerging in these discussions include quantum plasma dynamic-nonlocal-screening, plasmons, polaritons, linear electromagnetic response, excitons, polarons, phonons, magnetic Landau quantization, van der Waals interactions, chemisorption, etc. Considerable attention is also given to low dimensional and nanostructured systems, including quantum wells, wires, dots and superlattices, as well as materials having exceptional conduction properties such as Superconductors, Superfluids and Graphene.
Contents
1: Dirac Notation and Transformation Theory
2: Identical Particles and Second Quantization: Occupation Number Representation
3: Q.M. Pictures; Heisenberg Eqn.; Linear Response; Superoperators and Non-Markovian Eqns.
4: Schwinger Action Principle and Variational Calculus
5: Retarded Green's Function
6: Quantum Mechanical Ensemble Averages and Statistical Thermodynamics
7: Thermodynamic Green's Functions and Spectral Structure
8: Equations of Motion with Particle-Particle Interactions and Approximations
9: Nonequilibrium Green's Functions; Variational Relations & Approximations for Particle Interactions
10: RPA Plasma Phenomenology, Semiclassical & Hydrodynamic Models
11: Interacting Electron-Hole-Phonon System
12: Graphene
13: Superfluidity and Superconductivity
