497 citations · 8.4k across the 112 of their papers we have counts for
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Practical solutions for perturbed f(R) gravity
Alireza Hojjati, Levon Pogosian, Alessandra Silvestri +1
We examine the accuracy of the quasi-static approximation and a parametric form commonly employed for evolving linear perturbations in f(R) gravity theories and placing cosmologica…
Primordial Magnetism in CMB B-modes
Levon Pogosian, Tanmay Vachaspati, Amit Yadav
Cosmic Microwave Background (CMB) polarization B-modes induced by Faraday Rotation (FR) can provide a distinctive signature of primordial magnetic fields because of their character…
Examining the evidence for dynamical dark energy
Gong-Bo Zhao, Robert G. Crittenden, Levon Pogosian +1
We apply a new non-parametric Bayesian method for reconstructing the evolution history of the equation-of-state of dark energy, based on applying a correlated prior for ,…
Probing Primordial Magnetism with Off-Diagonal Correlators of CMB Polarization
Amit P. S. Yadav, Levon Pogosian, Tanmay Vachaspati
Primordial magnetic fields (PMF) can create polarization -modes in the cosmic microwave background (CMB) through Faraday rotation (FR), leading to non-trivial 2-point and 4-poin…