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Introduction to the Functional Renormalization Group [[electronic resource] /] / by Peter Kopietz, Lorenz Bartosch, Florian Schütz



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Autore: Kopietz Peter Visualizza persona
Titolo: Introduction to the Functional Renormalization Group [[electronic resource] /] / by Peter Kopietz, Lorenz Bartosch, Florian Schütz Visualizza cluster
Pubblicazione: Berlin, Heidelberg : , : Springer Berlin Heidelberg : , : Imprint : Springer, , 2010
Edizione: 1st ed. 2010.
Descrizione fisica: 1 online resource (XII, 380 p. 68 illus.)
Disciplina: 515/.7
Soggetto topico: Physics
Solid state physics
Spectroscopy
Microscopy
Statistical physics
Dynamical systems
Quantum physics
Magnetism
Magnetic materials
Mathematical Methods in Physics
Solid State Physics
Spectroscopy and Microscopy
Complex Systems
Quantum Physics
Magnetism, Magnetic Materials
Persona (resp. second.): BartoschLorenz
SchützFlorian
Note generali: Bibliographic Level Mode of Issuance: Monograph
Nota di bibliografia: Includes bibliographical references and index.
Nota di contenuto: I Foundations of the renormalization group -- Phase Transitions and the Scaling Hypothesis -- Mean-Field Theory and the Gaussian Approximation -- Wilsonian Renormalization Group -- Critical Behavior of the Ising Model Close to Four Dimensions -- Field-Theoretical Renormalization Group -- II Introduction to the functional renormalization group -- Functional Methods -- Exact FRG Flow Equations -- Vertex Expansion -- Derivative Expansion -- III Functional renormalization group approach to fermions -- Fermionic Functional Renormalization Group -- Normal Fermions: Partial Bosonization in the Forward Scattering Channel -- Superfluid Fermions: Partial Bosonization in the Particle–Particle Channel.
Sommario/riassunto: This book, based on a graduate course given by the authors, is a pedagogic and self-contained introduction to the renormalization group with special emphasis on the functional renormalization group. The functional renormalization group is a modern formulation of the Wilsonian renormalization group in terms of formally exact functional differential equations for generating functionals. In Part I the reader is introduced to the basic concepts of the renormalization group idea, requiring only basic knowledge of equilibrium statistical mechanics. More advanced methods, such as diagrammatic perturbation theory, are introduced step by step. Part II then gives a self-contained introduction to the functional renormalization group. After a careful definition of various types of generating functionals, the renormalization group flow equations for these functionals are derived. This procedure is shown to encompass the traditional method of the mode elimination steps of the Wilsonian renormalization group procedure. Then, approximate solutions of these flow equations using expansions in powers of irreducible vertices or in powers of derivatives are given. Finally, in Part III the exact hierarchy of functional renormalization group flow equations for the irreducible vertices is used to study various aspects of non-relativistic fermions, including the so-called BCS-BEC crossover, thereby making the link to contemporary research topics.
Titolo autorizzato: Introduction to the Functional Renormalization Group  Visualizza cluster
ISBN: 3-642-05094-8
Formato: Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione: Inglese
Record Nr.: 996466835603316
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Serie: Lecture Notes in Physics, . 0075-8450 ; ; 798