This textbook covers a broad spectrum of developments in QFT emphasizing those aspects that are now well consolidated & for which satisfactory theoretical descriptions have been provided The book is unique in that it offers a new approach to the subject & explores many topics merely touched upon if covered at all in standard reference works A detailed & largely non-technical introductory chapter traces the development of QFT from its inception in 1926 The elegant functional differential approach put forward by Schwinger referred to as the quantum dynamical (action) principle & its underlying theory are used systematically in order to generate the so-called vacuum-to-vacuum transition amplitude of both abelian & non-abelian gauge theories in addition to Feynman's well-known functional integral approach referred to as the path-integral approach Given the wealth of information also to be found in the abelian case equal importance is put on both abelian & non-abelian gauge theories Particular emphasis is placed on the concept of a quantum field & its particle content to provide an appropriate description of physical processes at high energies where relativity becomes indispensable Moreover quantum mechanics implies that a wave function renormalization arises in the QFT field independent of any perturbation theory
- a point not sufficiently emphasized in the literature The book provides an overview of all the fields encountered in present high-energy physics together with the details of the underlying derivations Further it presents deep inelastic experiments as a fundamental application of quantum chromodynamics Though the author makes a point of deriving points in detail the book still requires good background knowledge of quantum mechanics including the Dirac Theory as well as elements of the Klein-Gordon equation The present volume sets the language the notation & provides additional background for reading Quantum Field Theory II
- Introduction to Quantum Gravity Supersymmetry & String Theory by the same author Students in this field might benefit from first reading the book Quantum Theory A Wide Spectrum (Springer 2006) by the same author