This book describes, in clear terms, the Why, What and the How of Quantum Field Theory. The raison d'etre of QFT is explained by starting from the dynamics of a relativistic particle and demonstrating how it leads to the notion of quantum fields. Non-perturbative aspects and the Wilsonian interpretation of field theory are emphasized right from the start. Several interesting topics such as the Schwinger effect, Davies-Unruh effect, Casimir effect and spontaneous symmetry breaking introduce the reader to the elegance and breadth of applicability of field theoretical concepts. Complementing the conceptual aspects, the book also develops all the relevant mathematical techniques in detail, leading e.g., to the computation of anomalous magnetic moment of the electron and the two-loop renormalisation of the self-interacting scalar field. It contains nearly a hundred problems, of varying degrees of difficulty, making it suitable for both self-study and classroom use.

A refreshingly new approach to developing and teaching QFT Author is a leading theoretical physicist, known too for his excellent writing and teaching A slim volume but covering all the main concepts and calculational prerequisites Problems interspersed in the text help to give the student a deep understanding in confidence in using QFT Interesting applications beyond standard calculations show the broad range of applicability of these methods

Autorentext
Professor Padmanabhan, theoretical physicist and cosmologist, is currently a Distinguished Professor at IUCAA, Pune, India. A gifted researcher and teacher, he has published nearly 250 technical papers and authored ten books which have made significant impact. His research has won prizes six times in recent years from the Gravity Research Foundation, USA including the First Award in 2008. He is currently (2011-14) the Chairman of the IUPAP Astrophysics Commission and was the President of the IAU Cosmology Commission (2009-12). He has received numerous national and international awards including Padma Shri, the presidential medal of honor in India.

Inhalt
From Particles to Fields.- Disturbing the Vacuum.- From Fields to Particles.- Real Life I: Interactions.- Real Life II: Fermions and QED.- A Potpourri of Problems.