The theory M is a theory worked out by Edward Witten the purpose of which is to unify the five theories of the cords.

Introduction

One names theory M a physical theory worked out by the professor Edward Witten with an aim of unifying different the theories from the supercordes already existing and connected between them by dualities. To date, only the traditional Limite of this theory is known. It is the maximum theory of Supergravité with 11 dimensions. The Space-target of the theory M thus has a space dimension moreover than the Dimension criticizes different supercordes.

From a quantum point of view, the fundamental object of this theory should be a Brane (generalization with NR dimensions of the Concept of Membrane) and not a cord, i.e. an object whose Volume of universe is wide in two dimensions of space and a dimension of time whereas the volume of universe of a cord is wide in a dimension of space and one of time. By compactification of the membrane around additional dimension previously evoked, one finds the fundamental cord of theory IIA. Unfortunately, contrary to the theory of the cords in which the action of Nambu-Goto can be quantified thanks to the presence of the Symétrie conforms, the similar theory in the case of the membrane does not have this symmetry, which makes the analysis direct much more difficult and up to now unfinished.

The name

To tell the truth, this theory does not have a true name yet. Nevertheless, she answers temporarily in the name of the only letter “M”. Edward Witten gave this name to its theory to allow several choices according to the tastes: initial of magic, mysterious or mystical according to its elaborative which plays with this letter. Some see there the “W” of Witten to back. Another mnemotechnical interpretation is the M for mother or matrix since this theory unifies the various mathematical formulations of the same theory.

See too

Related articles

• Brane S
• Coupling in theory of the cords
• Duality of cord
• Edward Witten
• Supergravité
• Supersymmetry
• Theory of the cords
• Theory of the supercordes

External bonds

• a thesis on the subject
• Mr. Theory Tutorial by Edward Witten

Simple: M-theory Zh-min-nan: M lí-lūn

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