Axion Isocurvature and Magnetic Monopoles
arXiv:1511.06347 · doi:10.1103/PhysRevLett.116.141803
Abstract
We propose a simple mechanism to suppress axion isocurvature fluctuations using hidden sector magnetic monopoles. This allows for the Peccei-Quinn scale to be of order the unification scale consistently with high scale inflation.
13 pages