"Quantum field theory is frequently approached from the perspective of particle physics. This book adopts a more general point of view and includes applications of condensed matter physics. Written by a highly respected writer and researcher, it first develops traditional concepts, including Feynman graphs, before moving on to key topics such as functional integrals statistical mechanics, and Wilson's renormalization group. The connection between the latter and conventional perturbative renormalization is explained."--BOOK JACKET. "Quantum Field Theory is an exceptional textbook for graduate students familiar with advance quantum mechanics as well as physicists with an interest in theoretical physics."--BOOK JACKET.