Simple currents and extensions of vertex operator algebras

Details Simple currents and extensions of vertex operator algebras Simple currents and extensions of vertex operator algebras

1995-04-14

arxiv.org/abs/q-alg/9504008v2

Physics

High Energy Physics

High Energy Physics - Theory

Latex, 41 pages; One important reference is added plus some minor changes

Scientific paper

10.1007/BF02099628

We consider how a vertex operator algebra can be extended to an abelian intertwining algebra by a family of weak twisted modules which are {\em simple currents} associated with semisimple weight one primary vectors. In the case that the extension is again a vertex operator algebra, the rationality of the extended algebra is discussed. These results are applied to affine Kac-Moody algebras in order to construct all the simple currents explicitly (except for $E_8$) and to get various extensions of the vertex operator algebras associated with integrable representations.

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