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Teor´ ia De La Renormalizaci´ on De Wilson Aplicada Al Modelo De Ginzburg-Landau Renormalization Theory Applied To The Ginzburg-Landau Model

F. Fonseca, Pedro D. Fonseca, Sede Bogot

Published Jan 1, 2011• 0 citations
OpenAlex

Abstract

This work explains the method of Wilson renormalization applied to the Ginzburg-Landau model. The calculation shows in detail how to perform the renormalization of the partition function, and the deduction of the renormalization group equations. The fundamental purpose of the manuscript is to provide a guidance to graduate students in physics, in the area of statistical mechanics.

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This work explains the method of Wilson renormalization applied to the Ginzburg-Landau model. The calculation shows in detail how to perform the renormalization of the partition function, and the deduction of the renormalization group equations. The fundamental purpose of the manuscript is to provide a guidance to graduate students in physics, in the area of statistical mechanics.
Abstract The successful calculation of critical exponents for continuous phase transitions is one of the main achievements of theoretical physics over the last quarter-century. This was achieved through the use of scaling and field-theoretic techniques which have since become standard equipment in many areas of physics, especially quantum field theory. This book provides a thorough introduction to these techniques. Continuous phase transitions are introduced, then the necessary statistical mechanics is summarized, followed by standard models, some exact solutions and techniques for numerical simulations. The real-space renormalization group and mean-field theory are then explained and illustrated. The final chapters cover the Landau-Ginzburg model, from physical motivation, through diagrammatic perturbation theory and renormalization to the renormalization group and the calculation of critical exponents above and below the critical temperature.
The sophistication of modern tools used in the study of statistical mechanics and field theory is often an obstacle to the easy understanding of new important current results reported in journals. The main purpose of this book is to introduce the reader to the methods of the fluctuation (field) theory of phase transitions and critical phenomena so as to provide a good source for research. The introductory contents are concerned with ideas of description, thermodynamic stability theory related to phase transitions, major experimental facts, basic models and their relationships. Special attention is paid to the mean field approximation and to the Landau expansion for simple and complex models of critical and multicritical phenomena. An instructive representation of the modern perturbation theory and the method of the renormalization group is developed for field models of phase transitions. The essential influence of the fluctuations on the critical behaviour is established together with the theory of correlation functions, Gaussian approximation, the Ginzburg criterion, [symbol]- and 1/n- expansions as practical realizations of the renormalization group ideas. Applications of the theory to concrete aspects of condensed matter physics are considered: quantum effects, Bose condensation, crystal anisotropy, superconductors and liquid crystals, effects of disorder of type randomly distributed quenched impurities and random fields. This volume can be used as an advanced University course book for students with a basic knowledge of statistical physics and quantum mechanics. It could be considered as a complementary text to a standard University course on statistical physics