87 citations
- Nanjing UniversityCN21 papers
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Showing 2009Show all
2 papers · 1 filter
hep-th2009★ 3 cited
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…
hep-th2009★ 2 cited
Inner brane: A D3-brane in the Nappi-Witten model from an inner group automorphism
Yeuk-Kwan E. Cheung, Laurent Freidel
WZW models are abstract conformal field theories with an infinite dimensional symmetry which accounts for their integrability, and at the same time they have a sigma model descript…