Gauge/Gravity Duality: Foundations and Applications

I love this book is a hard reading but nonetheless very very interesting. It has a total of 15 chapters divided in three main parts I have only gone through PART I (Prerequisites): 1-Elements of field theory; 2-Elements of Gravity; 3-Symmetries in Quantum field theories; 4 -Introduction to superstring theory. I must say that these chapters are excellent they are not easy but they are worth the reading you must know already all of these if you want to get into the AdS/CFT correspondence anyway. Then I have gone only through the first chapter of the second part, PART II (Gauge/Gravity Duality) : 5-The AdS/CFT correspondence, apart from this chapter it brings this second part also the chapters 6-Tests of the AdS/CFT correspondence; 7- Integrability and Scattering amplitudes; 8-Further examples of the AdS/CFT correspondence; 9-Holographic renormalization group flows; 10-Duality with D-Branes in Supergravity; 11-Finite Temperature and density. Also brings a PART III (Applications) with four more chapters, this book is AMAZING! for an amazing topic the AdS/CFT correspondence of Juan Maldacena discovered back in 1998!

Useful reference text for specialists and postgraduates entering the field.

Any methodology for solving difficult problems in string theory or quantum field theory that seems to show some promise is always welcomed by practitioners in these two areas. Historically, most of the emphasis has been in perturbative calculations, which cannot be used for problems that involved strong coupling, such as quantum chromodynamics or the general bound state problem in quantum field theory.This book outlines an interesting approach to these types of problems that is based on a paper that was written by Juan Malcadena in 1998 and which has instigated a considerable amount of research since then. Marketed (with some justification) as a technique for studying strongly coupled field theories, the AdS/CFT correspondence is described as a map relating gravitational theories on asymptotically Anti-de Sitter spacetimes to conformal field theories. Those readers who want to familiarize themselves with this approach, and the more general methodology that is designated as ‘gauge/gravity duality’, will find the presentation adequate, as long as they are very familiar with superstring theory, supergravity, the mathematical formalism of general relativity, quantum chromodynamics, and of course conformal field theories in their different guises. The authors do give and overview of some of this background in the first four chapters, but readers who are not familiar with this material may find it heavy-going and too terse.Some readers may be skeptical regarding the claim that N = 4 super Yang-Mills theory in 3 + 1 dimensions is “dynamically equivalent” to type IIB superstring theory on AdS(5) X S(5). The authors define this dynamical equivalence to mean that both theories describe the same physics from two different perspectives, but since experimental evidence is what determines the viability of physical theories, this claim seems extravagant at the present time. The reviewer prefers viewing this correspondence in terms of “tools of calculation” for performing difficult derivations in one side of the correspondence by mapping it to the other. In addition, some readers may be disappointed to learn that most of the calculations in the opening sections are done in the weak coupling limit on the string theory side. These readers, the reviewer being one of them, have expectations that the AdS/CFT correspondence is used to study non-perturbative phenomena, and therefore any talk about doing perturbation calculations is somewhat of a disappointment.The authors though are apparently aware of some of the current skepticism regarding the applicability of gauge/gravity duality and therefore spend a few chapters on how it can function as a calculation tool in areas such as quantum chromodynamics (QCD) and condensed matter. In fact, two entire chapters are spent on QCD, with emphasis on how gauge/gravity duality can be applied to the confinement problem and to chiral symmetry breaking, in spite of the fact that QCD has no underlying supersymmetry. After studying these chapters, readers who need a more in-depth treatment will be prepared to consult the references or more advanced works on the subject.

A very nice book, with a good selection of topics in this huge field of physics, and useful reviews of basic previous results needed for understanding the core theme of the book. Useful.