5 citations · 16 across the 7 of their papers we have counts for
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Partition functions, mapping class groups and Drinfeld doubles
Jens Fjelstad, Jurgen Fuchs, Christoph Schweigert +1
Higher genus partition functions of two-dimensional conformal field theories have to be invariants under linear actions of mapping class groups. We illustrate recent results [4,6]…
On duality and extended chiral symmetry in the SL(2,R) WZW model
Jens Fjelstad
Two chiral aspects of the SL(2,R) WZW model in an operator formalism are investigated. First, the meaning of duality, or conjugation, of primary fields is clarified. On a class of…
Modular invariant partition functions for non-compact G/Ad(H) models
Jonas Bjornsson, Jens Fjelstad
We propose a spectrum for a class of gauged non-compact G/Ad(H) WZNW models, including spectrally flowed images of highest, lowest, and mixed extremal weight modules. These are com…
A no-ghost theorem for the bosonic Nappi-Witten string
Gang Chen, Yeuk-Kwan E. Cheung, Zheyong Fan +2
We prove a no-ghost theorem for a bosonic string propagating in Nappi-Witten spacetime. This is achieved in two steps. We first demonstrate unitarity for a class of NW/U(1) modules…
Uniqueness of open/closed rational CFT with given algebra of open states
Jens Fjelstad, Jurgen Fuchs, Ingo Runkel +1
We study the sewing constraints for rational two-dimensional conformal field theory on oriented surfaces with possibly non-empty boundary. The boundary condition is taken to be the…
TFT construction of RCFT correlators V: Proof of modular invariance and factorisation
Jens Fjelstad, Jurgen Fuchs, Ingo Runkel +1
The correlators of two-dimensional rational conformal field theories that are obtained in the TFT construction of [FRSI,FRSII,FRSIV] are shown to be invariant under the action of t…