The purpose of this book is to introduce string theory without
assuming any background in quantum field theory. Part I of this
book follows the development of quantum field theory for point
particles, while Part II introduces strings. All of the tools and
concepts that are needed to quantize strings are developed first
for point particles. Thus, Part I presents the main framework of
quantum field theory and provides for a coherent development of the
generalization and application of quantum field theory for point
particles to strings.Part II emphasizes the quantization of the
bosonic string. The treatment is most detailed in the path integral
representation where the object of interest, the partition
function, is a sum over random surfaces. The relevant mathematics
of Riemann surfaces is covered. Superstrings are briefly
introduced, and the sum over genus 0 supersurfaces is computed.The
emphasis of the book is calculational, and most computations are
presented in step-by-step detail. The book is unique in that it
develops all three representations of quantum field theory
(operator, functional Schrodinger, and path integral) for point
particles and strings. In many cases, identical results are worked
out in each representation to emphasize the
representation-independent structures of quantum field theory.
General
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