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Towards reconstruction of unlensed, intrinsic CMB power spectra from lensed map
Barun Kumar Pal, Hamsa Padmanabhan, Supratik Pal
We propose a method to extract the unlensed, intrinsic CMB temperature and polarization power spectra from the observed (i.e., lensed) spectra. Using a matrix inversion technique,…
A comparison of CMB lensing efficiency of gravitational waves and large scale structure
Hamsa Padmanabhan, Aditya Rotti, Tarun Souradeep
We provide a detailed treatment and comparison of the weak lensing effects due to large-scale structure (LSS), or scalar density perturbations and those due to gravitational waves(…
CosMIn: The Solution to the Cosmological Constant Problem
Hamsa Padmanabhan, T. Padmanabhan
The current acceleration of the universe can be modeled in terms of a cosmological constant. We show that the extremely small value of ΛL_P^2 ~ 3.4 x 10^{-122}, the holy grail of t…