The importance and the beauty of modern quantum field theory resides in
the power and variety of its methods and ideas, which find application
in domains as different as particle physics, cosmology, condensed
matter, statistical mechanics and critical phenomena. This book
introduces the reader to the modern developments in a manner which
assumes no previous knowledge of quantum field theory. Along with
standard topics like Feynman diagrams, the book discusses effective
lagrangians, renormalization group equations, the path integral
formulation, spontaneous symmetry breaking and non-abelian gauge
theories. The inclusion of more advanced topics will also make this a
most useful book for graduate students and researchers.