What is String Theory?
by Joseph Polchinski
Publisher: arXiv 1994
Number of pages: 154
The first part is an introduction to conformal field theory and string perturbation theory. The second part deals with the search for a deeper answer to the question posed in the title. Contents: Conformal Field Theory; String Theory; Vacua and Dualities; String Field Theory or Not String Field Theory; Matrix Models.
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by Neil Lambert - King's College London
This course will introduce string theory, which has become the dominant framework for a complete theory of all physical phenomena. As such it is in some sense a course to introduce the modern view of particle physics at its most fundamental level.
by Miao Li - arXiv
This short book is an introduction to some recent developments in string theory and M theory. The author tries to concentrate on the main physical aspects, and often leaves more technical details to the original literature.
by Maximilian Kreuzer - Technische Universitat Wien
Contents: Introduction; The bosonic string; Quantization of bosonic strings; Superstrings; Conformal field theory (conformal group, Wick rotation and Euclidean fields, Tensors, energy-momentum, and correlations, First order systems and ghosts, etc).
by Thomas Mohaupt - arXiv
These notes give an introduction to string theory for students and interested researches. No previous knowledge of string theory is assumed. The focus is on gravitational aspects and we explain how gravity is described in string theory.