Feynman Lectures on Gravitation

Rating:
Summary: General relativity as a quantum gauge field theory.
Review: Feynman gave a series of lectures on gravitation at a graduate seminar at Caltech in 1962. The lectures were recorded and transcribed by Morinigo and Wagner. A very readable introduction on quantum gravity was added by the editor, Brian Hatfield (whose book on quantum field theory and strings, I also recommend.) This is the only book I've seen which develops GR from a quantum field theory point of view. Feynman's lectures show that the GR field equations result from the requirement of gauge invariance under Lorentz transformations for a massless spin-2 field (i.e graviton). This is a more fundamental approach than the usual differential geometric framework and shows what the equivalence principle really means in terms of fundamental symmetries. Highly recommended for a modern field theory viewpoint of GR.

Rating:
Summary: Fascinating
Review: This is a wonderful book which shows how a classical field theory like General Relativity can be derived from a quantum field theory. It also points out the extreme difficulty of accomplishing this in the case of gravity and ending up with a consistent, anomaly free theory.

Readers of this book will benefit from familiarity with both quantum field theory and relativity as well as a certain amount of mathematical sophistication. Don't be fooled by the similarity of title to other "Feynman Lectures on..." because this book is based on an upper level graduate physics course and assumes the background of a typical PhD student in physics.

Deep, complex and difficult going but well worth the effort to see the elegance of the connection between General Relativity and QFT.

Rating:
Summary: Fascinating
Review: This is a wonderful book which shows how a classical field theory like General Relativity can be derived from a quantum field theory. It also points out the extreme difficulty of accomplishing this in the case of gravity and ending up with a consistent, anomaly free theory.

Readers of this book will benefit from familiarity with both quantum field theory and relativity as well as a certain amount of mathematical sophistication. Don't be fooled by the similarity of title to other "Feynman Lectures on..." because this book is based on an upper level graduate physics course and assumes the background of a typical PhD student in physics.

Deep, complex and difficult going but well worth the effort to see the elegance of the connection between General Relativity and QFT.