Consistent Compactification of Double Field Theory on Non-geometric Flux Backgrounds

Jan 20, 2014
45 pages
Published in:
  • JHEP 05 (2014) 085
  • Published: 2014
e-Print:
Report number:
  • LMU-ASC-85-13,
  • MPP-2013-315

Citations per year

2014201720202023202402468101214
Abstract: (arXiv)
In this paper, we construct non-trivial solutions to the 2D2D-dimensional field equations of Double Field Theory (DFT) by using a consistent Scherk-Schwarz ansatz. The ansatz identifies 2(Dd)2(D-d) internal directions with a twist UMNU^M{}_N which is directly connected to the covariant fluxes FABC\mathcal{F}_{ABC}. It exhibits 2(Dd)2(D-d) linear independent generalized Killing vectors KIJK_I{}^J and gives rise to a gauged supergravity in dd dimensions. We analyze the covariant fluxes and the corresponding gauged supergravity with a Minkowski vacuum. We calculate fluctuations around such vacua and show how they gives rise to massive scalars field and vectors field with a non-abelian gauge algebra. Because DFT is a background independent theory, these fields should directly correspond the string excitations in the corresponding background. For (Dd)=3(D-d)=3 we perform a complete scan of all allowed covariant fluxes and find two different kinds of backgrounds: the single and the double elliptic case. The later is not T-dual to a geometric background and cannot be transformed to a geometric setting by a field redefinition either. While this background fulfills the strong constraint, it is still consistent with the Killing vectors depending on the coordinates and the winding coordinates, thereby giving a non-geometric patching. This background can therefore not be described in Supergravity or Generalized Geometry.
Note:
  • 44 pages, 3 tables, references added, typos corrected
  • Flux compactifications
  • Superstring Vacua
  • String Duality
  • vector: Killing
  • flux: background
  • string: excited state
  • field theory: vector
  • gauge: nonabelian
  • algebra: gauge
  • field theory: scalar