Introduction to the functional renormalization group / P. Kopietz, L. Bartosch, F. Schutz.

Format:

Book

Author/Creator:

Kopietz, Peter, 1961-

Contributor:

Bartosch, L.

Schutz, F.

Series:

Lecture notes in physics ; 798.

Lecture notes in physics, 0075-8450 ; 798

Language:

English

Subjects (All):

Renormalization group.

Integration, Functional.

Physical Description:

1 online resource (XII, 380 p. 68 illus.)

Edition:

1st ed. 2010.

Place of Publication:

New York : Springer, 2009.

Language Note:

English

Summary:

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.

Contents:

pt. 1. Foundations of the renormalization group

pt. 2. Introduction to the functional renormalization group

pt. 3. Functional renormalization group approach to fermions.

Notes:

Bibliographic Level Mode of Issuance: Monograph

Includes bibliographical references and index.

ISBN:

9783642050947

3642050948