Cosmic Microwave Background Polarization as a Direct Test of Inflation
Cosmic Microwave Background Polarization as a Direct Test of Inflation
We study the autocorrelation function of cosmic microwave background polarization anisotropies and their cross correlation with temperature fluctuations as a probe of the causal structure of the Universe. Because polarization is generated at the last scattering surface, models in which fluctuations are causally produced on subhorizon scales cannot generate correlations …