Introduction to String Theory
by Thomas Mohaupt
Publisher: arXiv 2002
Number of pages: 78
The aim of these notes is to 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 in some detail how gravity is described in string theory in terms of the graviton excitation of the string and through background gravitational fields.
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by David Tong - University of Cambridge
These lecture notes provide a detailed introduction to the bosonic string and conformal field theory. The text is aimed at beginning graduate students. It assumes a working knowledge of quantum field theory and general relativity.
by Gerard 't Hooft - Utrecht University
Contents: strings in QCD, the classical string, open and closed strings, quantization, Lorentz invariance, interactions and vertex operators, BRST quantization, the Polyakov path integral, T-Duality, complex coordinates, fermions in strings, etc.
A short introduction to superstring theory. From the table of contents: Classical Theory of String; Quantization; Supersymmetry and Superstring; Compactification; Types of Superstring Theory; M-theory; Problems and Future Development.
by Ashoke Sen - arXiv
Basic aspects of non-perturbative string theory are discussed. The topics include test of duality symmetries based on the analysis of the low energy action and the spectrum of BPS states, relationship between different duality symmetries, etc.