Pale Glares of Dark Matter in Quantum Spacetime
  A U(1) gauge theory turns, on physically motivated models of Quantum Spacetime, into a U($\infty$) gauge theory, hence free classical electrodynamics is no longer free and neutral fields may have electromagnetic interactions. We discuss the last point for scalar fields, possibly describing dark matter; we have in mind the gravitational collapse of binary systems or future applications to self gravitating Bose-Einstein condensates as possible sources of evidence of quantum gravitational phenomena. The effects so far considered, however, seem too faint to be detectable at present. 
Sergio Doplicher, Klaus Fredenhagen, Gerardo Morsella, Nicola   Pinamonti
gr-qc hep-th