Multiple inflation and the WMAP “glitches”
Multiple inflation and the WMAP “glitches”
Observations of anisotropies in the cosmic microwave background by the Wilkinson Microwave Anisotropy Probe suggest the possibility of oscillations in the primordial curvature perturbation. Such deviations from the usually assumed scale-free spectrum were predicted in the multiple inflation model wherein ``flat direction'' fields undergo rapid phase transitions due to the …