Maximum Entropy deconvolution of Primordial Power Spectrum

Understand

It is well known that CMB temperature anisotropies and polarization can be used to probe the metric perturbations in the early universe.

• Presently, there exist neither any observational detection of tensor modes of primordial metric perturbations nor of primordial non-Gaussianity.
• In such a scenario, primordial power spectrum of scalar metric perturbations is the only correlation function of metric perturbations (presumably generated during inflation) whose effects can be directly probed through various observations.
• To explore the possibility of any deviations from the simplest picture of the era of cosmic inflation in the early universe, it thus becomes extremely important to uncover the amplitude and shape of this (only available) correlation sufficiently well.