JOURNAL OF HIGH ENERGY PHYSICS, v.2017, no.07, pp.075 -
The (heterotic) double field theories and the exceptional field theories are
manifestly duality covariant formulations, describing low-energy limit of various superstring
and M-theory compactifications. These field theories are known to be reduced to
the standard descriptions by introducing appropriately parameterized generalized metric
and by applying suitably chosen section conditions. In this paper, we apply these formulations
to non-geometric backgrounds. We introduce different parameterizations for the
generalized metric in terms of the dual fields which are pertinent to non-geometric fluxes.
Under certain simplifying assumptions, we construct new effective action for non-geometric
backgrounds. We then study the non-geometric backgrounds sourced by exotic branes and
find their U-duality monodromy matrices. The charge of exotic branes obtained from these
monodromy matrices agrees with the charge obtained from the non-geometric flux integral.
(c) The Authors