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Relativistic Many-Body Theory: A New Field-Theoretical Approach de Ingvar Lindgren

Relativistic Many-Body Theory: A New Field-Theoretical Approach: Springer Series on Atomic, Optical, and Plasma Physics, cartea 63

Autor Ingvar Lindgren
en Limba Engleză Paperback – 15 iul 2013
This book gives a comprehensive account of relativistic many-body perturbation theory, based upon field theory. After some introductory chapters about time-independent and time dependent many-body perturbation theory (MBPT), the standard techniques of S-matrix and Green’s functions are reviewed. Next, the newly introduced covariant-evolution-operator method is described, which can be used, like the S-matrix method, for calculations in quantum electrodynamics (QED). Unlike the S-matrix method, this has a structure that is similar to that of MBPT and therefore can serve as basis for a unified theory. Such an approach is developed in the final chapters, and its equivalence to the Bethe-Salpeter equation is demonstrated. Possible applications are discussed and numerical illustrations given.
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Specificații

ISBN-13: 9781461428718
ISBN-10: 1461428718
Pagini: 384
Ilustrații: XVIII, 366 p.
Dimensiuni: 155 x 235 x 20 mm
Greutate: 0.54 kg
Ediția:2011
Editura: Springer
Colecția Springer
Seria Springer Series on Atomic, Optical, and Plasma Physics

Locul publicării:New York, NY, United States

Public țintă

Research

Cuprins

Introduction.- Time-independent formalism.- Time-dependent formalism.- S-matrix.- Green’s functions.- Covariant evolution operator and Green’s operator.- Numerical illustrations to Part II.- Covariant evolution combined with electron correlation.- The Bethe-Salpeter equation.- Implementation of the MBPT-QED procedure with numerical results.- Analytical treatment of the Bethe-Salpeter equation.- Regularization and renormalization.- Summary and Conclusions.- Notations and definitions.- Second quantization.- Representations of states and operators.- Dirac equation and the momentum representation.- Lagrangian field theory.- Semiclassical theory of radiation.- Covariant theory of Quantum ElectroDynamics.- Feynman diagrams and Feynman amplitude.- Evaluation rules for time-ordered diagrams.- Some integrals.- Unit systems and dimensional analysis.- References.- Index.

Recenzii

“This well-written book, aimed at theoretical and applied physicists, describes some recent progress in the treatment of atomic and molecular systems, possibly with many electrons and highly charged. …  The book is, in my opinion, suitable for physics graduate students, and for specialists interested in being introduced to the field-theoretical approach to many body perturbation theory.” (Marco Falconi, Mathematical Reviews, July, 2017)
From the reviews:

“The present book aims to provide an overview and to summarize the results obtained with the modern formalism … . All methods are illustrated using numerical examples. This textbook is a reliable guidefor advanced graduate students and researchers.” (Gert Roepstorff, Zentralblatt MATH, Vol. 1218, 2011)

Textul de pe ultima copertă

Relativistic Many-Body Theory treats — for the first time — the combination of relativistic atomic many-body theory with quantum-electrodynamics (QED) in a unified manner. This book can be regarded as a continuation of the book by Lindgren and Morrison, Atomic Many-Body Theory (Springer 1986), which deals with the non-relativistic theory of many-electron systems, describing several means of treating the electron correlation to essentially all orders of perturbation theory. The treatment of the present book is based upon quantum-field theory, and demonstrates that when the procedure is carried to all orders of perturbation theory, two-particle systems are fully compatible with the relativistically covariant Bethe-Salpeter equation. This procedure can be applied to arbitrary open-shell systems, in analogy with the standard many-body theory, and it is also applicable to systems with more than two particles. Presently existing theoretical procedures for treating atomic systems are, in several cases, insufficient to explain the accurate experimental data recently obtained, particularly for highly charged ions. This shortcoming is expected to be due to omission of combined QED-correlational effects, included in the new unified procedure.
All methods treated in Relativistic Many-Body Theory are illustrated with numerical examples. The main text is divided into three parts.
  • In Part I, the standard time-independent and time-dependent perturbation procedures are reviewed.
  •  Part II describes three methods for QED calculations, a) the standard S-matrix formulation, b) the Two-times Green’s-function method, developed by the St Petersburg Atomic Theory group, and c) the Covariant-evolution-operator  (CEO) method, recently developed by the Gothenburg Atomic Theory group.
  • In Part III, the CEO method is combined with electron correlation to arbitrary order to a unified MBPT-QED procedure. In this procedure the electron correlation can be included to high order, and therefore this procedure is expected to lead to faster convergence than treating the BS equation order by order.
Ingvar Lindgren is also the author of the highly-cited "Atomic Many-Body Theory" book published by Springer.

Caracteristici

Describes for the first time relativistic many-body perturbation theory, rigorously based upon field theory Provides a unified account of quantum electrodynamics and many-body perturbation theory Synthesizes the techniques of many-body perturbation theory and quantum field theory