String Theory

Contents

[[../Introduction|Introduction]] [[../Supersymmetry|Supersymmetry]] [[../Two-Dimensional Conformal Field Theory|Two-Dimensional Conformal Field Theory]] [[../String Quantization|String Quantization]] The Free String|The Free String String Interactions String Field Theory Compactification Orbifolds and Orientifolds T-Duality D-branes M-Theory

Notation

The metric has signature $(+,-,-,-,...)$.

Greek letters from the middle of the alphabet $(\mu,\nu,...)$ denote coordinates in spacetime. Roman letters taken from the beginning of the alphabet $(a,b,...)$ denote coordinates on the worldsheet.

The metric is denoted $g_{\mu \nu}$. In the case where there is a metric of spacetime and a metric of the worldsheet, the worldsheet metric is denoted $h_{a b}$

A lower-case $d$ is the number of dimensions. An upper-class $D$ represents the number of spacial dimensions.

The Free String

The Heterotic String Theories

String Interactions

String Field Theory

Compactification

Orbifolds and Orientifolds

T-Duality

D-branes

M-Theory