nLab
string

Context

String theory

Ingredients

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Critical string models

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Extended objects

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Topological strings

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Backgrounds

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Phenomenology

Physics

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Surveys, textbooks and lecture notes

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    • Axiomatizations

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    • Structural phenomena

    • Types of quantum field thories

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Contents

Idea

A string is a brane of dimension one higher than an ordinary particle:

where a 1-dimensional sigma-model may be thought of a describing the dynamics of particles propagating of a target space XX, a 2-dimensional sigma-model is said to described the dynamics of a string on some target space.

Much of traditional quantum field theory on XX may be understood in terms of second quantization of 1-dimensional sigma-models with target space XX. What is called string theory is the corresponding study of what happens to this situation as the 1-dimensional σ\sigma-model is replaced by a 2-dimensional one.

There is

(also called the F1-brane)

\,

Table of appearing in / (for classification see at ).

in d under has theory
(D=2n)(D = 2n)\,\,
\,\,
\,\,\,
\,\, with
\,\,
\,\,
(D=2n+1)(D = 2n+1)\,\,
\,\,\,
\,\,2d with
\,\,
\,\,\,
\,\,\,
\,\,\,
\,\,\,
()()
\,
\,
\,
D-brane for \,
\,
\,
/\,
\,,
\,
/
on
\, on
on

Last revised on March 17, 2017 at 02:17:01. See the history of this page for a list of all contributions to it.