Structure and Classification of Superconformal Nets

Details Structure and Classification of Superconformal Nets Structure and Classification of Superconformal Nets

2007-05-24

arxiv.org/abs/0705.3609v2

Annales Henri Poincare 9:1069-1121,2008

Physics

Mathematical Physics

49 pages. Section 8 has been removed. More details concerning the diffeomorphism covariance are given

Scientific paper

10.1007/s00023-008-0381-9

We study the general structure of Fermi conformal nets of von Neumann algebras on the circle, consider a class of topological representations, the general representations, that we characterize as Neveu-Schwarz or Ramond representations, in particular a Jones index can be associated with each of them. We then consider a supersymmetric general representation associated with a Fermi modular net and give a formula involving the Fredholm index of the supercharge operator and the Jones index. We then consider the net associated with the super-Virasoro algebra and discuss its structure. If the central charge c belongs to the discrete series, this net is modular by the work of F. Xu and we get an example where our setting is verified by considering the Ramond irreducible representation with lowest weight c/24. We classify all the irreducible Fermi extensions of any super-Virasoro net in the discrete series, thus providing a classification of all superconformal nets with central charge less than 3/2.

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