✈ [PDF / Epub] ✅ UANTUM THEORY OF MANY BODY SYSTEMSTechniues and applications By Alexandre M Zagoskin ✸ – Livesheep.pro Intended for graduate students in physics and related fields this text is a self contained treatment of the physics of many body systems from the point of view of condensed matter The approach uite trIntended for graduate students in physics and related fields this text is a self contained treatment of the physics of many body systems from the point of view of condensed matter The approach uite traditionally uses the mathematical formalism of uasiparticles and Green's functions In particular it covers all the important diagram techniues for normal and superconducting systems including the zero temperature perturbation theory and the Matsubara Keldysh and Nambu Gor'kov formalisms The book begins by introducing Green's function for one particle systems using Feynman path Integrals general perturbation theory and second uantization It then turns to the usual zero temperature formalism discussing the properties and physical meaning of Green's function for many body systems and then developing the diagram techniues of perturbation theory The theory is extended to finite temperatures including a discussion of the Matsubara formalism as well as the Keldysh techniue for essentially noneuilibrium systems The final chapter is devoted to applications of the techniues to superconductivity including discussions of the superconducting phase transition elementary excitations transport Andreev reflection and Josephson effect Problems at the end of each chapter help to guide learning and to illustrate the applications of the formalism.

Intended for graduate students in physics and related fields this text is a self contained treatment of the physics of many body systems from the point of view of condensed matter The approach uite traditionally uses the mathematical formalism of uasiparticles and Green's functions In particular it covers all the important diagram techniues for normal and superconducting systems including the zero temperature perturbation theory and the Matsubara Keldysh and Nambu Gor'kov formalisms The book begins by introducing Green's function for one particle systems using Feynman path Integrals general perturbation theory and second uantization It then turns to the usual zero temperature formalism discussing the properties and physical meaning of Green's function for many body systems and then developing the diagram techniues of perturbation theory The theory is extended to finite temperatures including a discussion of the Matsubara formalism as well as the Keldysh techniue for essentially noneuilibrium systems The final chapter is devoted to applications of the techniues to superconductivity including discussions of the superconducting phase transition elementary excitations transport Andreev reflection and Josephson effect Problems at the end of each chapter help to guide learning and to illustrate the applications of the formalism.

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