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String Theory

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Contents[edit | edit source]

Notation[edit | edit source]

The metric has signature .

Greek letters from the middle of the alphabet denote coordinates in spacetime. Roman letters taken from the beginning of the alphabet denote coordinates on the worldsheet.

The metric is denoted . In the case where there is a metric of spacetime and a metric of the worldsheet, the worldsheet metric is denoted

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

The Free String[edit | edit source]

The Bosonic String Theory[edit | edit source]

The Super string theory[edit | edit source]

The Heterotic String Theories[edit | edit source]

String Interactions[edit | edit source]

String Field Theory[edit | edit source]

Compactification[edit | edit source]

Orbifolds and Orientifolds[edit | edit source]

T-Duality[edit | edit source]

D-branes[edit | edit source]

M-Theory[edit | edit source]