Gauged supergravities and non-geometric Q/R-fluxes from asymmetric orbifold CFT's

Understand

We investigate the orbifold limits of string theory compactifications with geometric and non-geometric fluxes.

• Exploiting the connection between internal fluxes and structure constants of the gaugings in the reduced supergravity theory, we can identify the types of fluxes arising in certain classes of freely-acting symmetric and asymmetric orbifolds.
• We give a general procedure for deriving the gauge algebra of the effective gauged supergravity using the exact CFT description at the orbifold point.
• We find that the asymmetry is, in general, related to the presence of non-geometric Q- and R- fluxes.