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| Quantum Field Theory
Paperback
Edition: 2
Author: Quantum Field Theory
Publisher: Cambridge University Press
Release Date: 1996-06-13
ISBN-10: 0521478146
ISBN-13: 9780521478144
List Price: $78.00
Average Customer Rating:
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Summaries and Customer Reviews are supplied by Amazon.com
This book is a modern introduction to the ideas and techniques of quantum field theory. After a brief overview of particle physics and a survey of relativistic wave equations and Lagrangian methods, the author develops the quantum theory of scalar and spinor fields, and then of gauge fields. The emphasis throughout is on functional methods, which have played a large part in modern field theory. The book concludes with a brief survey of "topological" objects in field theory and, new to this edition, a chapter devoted to super symmetry. Graduate students in particle physics and high-energy physics will benefit from this book.
Good physical intuition into the topic
| Customer Rating:  | | To understand quantum field theory it is necessary to read more than one author. Ryder's book should definitely be included in the list of titles. |
Overview of QFT for those wanting a refreshing
| Customer Rating: | This book should not be used for beginners by which I mean those individuals with a background in QM and SR but not QFT. It presumes, like any QFT text, a thorough understanding of QM and SR. A strong foundation in tensor analysis, group theory, differential geometry and lie groups is recommended.
It has some interesting ways of introducing topics in QFT for example the dirac equation:
The author begins by showing the defects in quantizing the energy mass relationship resulting in the Klein Gordon equation. The author digresses before introducing the dirac equation and goes on about the correspondence between SU(2) and O(3), rotation group in 3-D, and then introduces the correspondence between SL ( 2, C) and the Lorentz group. It is shown that the Lorentz group is essentially SU(2) x SU(2). Thus we can specify a state to be operated by a Lorentz transformation by two angular momenta. Special combinations of these give spinors which transform in specific ways under lorentz transforms. We see that the dirac equation is a relation between these spinors.
Symmetries of the Langrangian and the "appearance" of gauge fields in constraining the Langrangian to certain local symmetries from global ones is introduced almost immediately. We see how this necessitates the introduction of the electromagnetic field. Maxwell's and Proca's equations are put in tensorial form. There is a nice section here on the geometry of gauge fields. Differential geometry really helps here.
The canonical quantization of scalar, spinor and photon fields is undertaken.
Path Integral quantization of spinor scalar and gauge fields is undertaken. The usual topics of functional integration and wick's theorem are dealt with. With see how Zo(J) ..transition amplitude of particle creation and destruction with source..is the generating functional for free particle green functions and it's relation to n point functions and VEV is given.Interaction are introduced and their relation to Zo(J) is explained. The relation between greens functions and the S matrix are derived. It is shown how the usual approach for photons does not work requiring gauge fixing. Fenyman rules for all of these are derived.
Spontaneous Symmetry breaking and the standard model is briefly delved into. Renormalization is dealt with.
Overall, I found the presentation of the material disorganized with poor motivation for the topics. However, the derivations are detailed and a nice supplement to other QFT books.
One major drawback is the lack of problems.
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ryder
| Customer Rating: | | its a good book for the beginners.The only drawback is it does not have exercise problems. |
An Inspiring Introduction to QFT
| Customer Rating: | One of the basic questions in the education of theoretical physics is, what is a good way of introducing QFT and giving the student a taste of what is to come? In my opinion, this book offers a fine solution to this thorny problem.
There are many sides to this question; for example, there is the view that the students should be exposed to this vast topic in a complete and thorough way (for such a text, I HIGHLY recommend Weinberg's 3 volume set, which, if not commonly regarded as a classic yet, soon will be), and also there is the point of view that most of the students studying QFT are experimentalists, so they should first be exposed to how to calculate amplitudes and cross sections for useful processes as soon as possible (see Peskin-Schroder for an outstanding exemplification of this principle). Both of these points of view have strong arguments supporting them, and there are many other reasonable opinions that might be taken; perhaps this is an indication that there is not any one approach to this subject which is a good introduction for all, but rather that the student must choose intelligently which text he/she finds they are most comfortable with. However, I can say that for me at least, this book had just the right selection of topics and at just the right level to get me interested in the subject and to give me a taste as to what it would be like if I were to go into it in more depth (which indeed I did). Other reviewers are quite right in pointing out that there are several inaccuracies in this text; also in more than a few places the treatment is considerably less clear than it might have been (this is one of the main strengths of Weinberg's set; every last detail is crystal clear, and the physical reasoning in the derivations is very rarely muddled in the math). Perhaps in this sense, the book could have been better written, and just by this element of style, I probably would have rated this 4 stars. However, I think that these valid criticisms are more than offset by the overwhelming strength of the book:that it is truly inspiring. Several reviewers have gone over details; I shall not rehash these matters, but instead leave off with the statement that this book was the best introduction to QFT that I could have bought. |
one of good books
| Customer Rating: | 1)as other reviewers put, we cannot expect every thing from one source. but without doubt, this is a good buy.
2)this is not so pedagogic as the book seller's copy on the backcover. it needs some endeavor of course.
3)major flaw i noticed is only one: at page 150 the author mingled two different things i.e. (a)subsidiary condition which excludes unphysical state from consideration (b)re-definition of norm which brings the unphysical state into consideration. |
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