Quantum Field Theory: Where We Are
arXiv:hep-th/0603155 · doi:10.1007/978-3-540-71117-9_4
Abstract
We comment on the present status, the concepts and their limitations, and the successes and open problems of the various approaches to a relativistic quantum theory of elementary particles, with a hindsight to questions concerning quantum gravity and string theory.
To appear in: An Assessment of Current Paradigms in the Physics of Fundamental Phenomena, to be published by Springer Verlag (2006)