Bose-Einstein Condensation, Dark Matter and Acoustic Peaks
  Scalar mediated interactions among baryons extend well above the Compton wavelength, when they are embedded in a Bose-Einstein condensate composed of the mediating particles. Indeed, this non-trivial environment results in an infinite-ranged interaction. We show that if the Dark Matter of the Universe is composed of such a condensate, the imprints of an interaction between baryonic and Dark Matter could be manifest as anomalies in the peak structure of the Cosmic Microwave Background. 
F. Ferrer (Oxford U.), J. A. Grifols (Barcelona, Autonoma U. and IFAE)