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 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.
by Washington Taylor, Barton Zwiebach - arXiv
Introduction to tachyon condensation in Witten's cubic bosonic open string field theory. We use both the low-energy Yang-Mills description and the language of string field theory to explain the problem of tachyon condensation on unstable D-branes.
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 M. Douglas, J. Gauntlett, M. Gross - American Mathematical Society
This volume highlights the interface between string theory and algebraic geometry. The topics covered include manifolds of special holonomy, supergravity, supersymmetry, D-branes, the McKay correspondence and the Fourier-Mukai transform.