After serving his apprenticeship as a field theorist at Cornell University ... Dr. Mitra sacrificed his chance of a brilliant research career in America in order to serve his country and his people. I deeply respect that choice, and I rejoice that his sacrifice was not made in vain. After a fruitful career as a pioneer and teacher of modern science in India, he now stands at the center of the vibrant scientific community that he helped to create. This volume is, among other things, a monument to his vision.

—from the Foreword by Freeman Dyson

Quantum Field Theory (QFT) may be the single most important concept in physics to be discovered in the twentieth century. This volume reflects the multidimensional impact of QFT on the evolution of physics in the last century. Dr. Asoke Mitra, editor for the volume and former student and colleague of Freeman Dyson, gathers here a selection of articles in the areas where the impact of QFT has been especially pronounced: from particle physics to string theory and extending to facets of astrophysics and the physics of condensed matter.

The wide range of topics covered makes this volume more than just an introductory text on QFT. Contributors include V. Gribov, M. Moshinsky, K. Nishijima, J. Schwarz, D. Shirkov, E. Witten and many more renowned experts in their respective fields. This book makes an excellent reference work for a broad spectrum of readers, from postdocs in key areas of QFT to specialists in currently evolving areas.