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A global operator approach to WZNW models via Krichever-Novikov type algebras

Martin Schlichenmaier ( University of Luxembourg )
Torsdag, 7 marts, 2013, at 15:00-16:00, in Aud. D2 (1531-119)
We present a global operator approach to Wess-Zumino-Novikov models for compact Riemann surfaces of arbitrary genus g with N marked points.
The approach is based on the multi-point Krichever-Novikov algebras of global meromorphic functions and vector fields, and the global algebras of affine type and their representations.
Using the global Sugawara construction and the identification of a certain subspace of the vector field algebra with the tangent space to the moduli space of the geometric data, the Knizhnik-Zamalodchikov connection is defined.
For fermionic representations it defines a projectively flat connection on the vector bundle of conformal blocks.
The presented work is joint work with Oleg Sheinman.
Organiseret af: QGM
Kontaktperson: Jørgen Ellegaard Andersen