Abstract
Starting from a sigma-model for a doubled target-space geometry, we show that the number of target-space dimensions can be reduced by half through a gauging procedure. We apply this formalism to a class of backgrounds relevant for double field theory, and illustrate how choosing different gaugings leads to string-theory configurations T-dual to each other. We furthermore discuss that given a conformal doubled theory, the reduced theories are conformal as well. As an example we consider the three-dimensional SU(2) WZW model and show that the only possible reduced backgrounds are the cigar and trumpet CFTs in two dimensions, which are indeed T-dual to each other.
Original language | English |
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Pages (from-to) | 730-747 |
Number of pages | 18 |
Journal | Fortschritte der Physik |
Volume | 64 |
Issue number | 10 |
DOIs | |
Publication status | Published - Oct 2016 |
Externally published | Yes |
Keywords
- Double field theory
- T-duality