68 citations · 339 across the 17 of their papers we have counts for
5 papers · 1 filter
Large scale anomalies in the CMB and non-Gaussianity in bouncing cosmologies
Ivan Agullo, Dimitrios Kranas, V. Sreenath
We propose that several of the anomalies that have been observed at large angular scales in the CMB have a common origin in a cosmic bounce that took place before the inflationary…
Observational consequences of Bianchi I spacetimes in loop quantum cosmology
Ivan Agullo, Javier Olmedo, V. Sreenath
Anisotropies generically dominate the earliest stages of expansion of a homogeneous universe. They are particularly relevant in bouncing models, since shears grow in the contractin…
Hamiltonian theory of classical and quantum gauge invariant perturbations in Bianchi I spacetimes
Ivan Agullo, Javier Olmedo, V. Sreenath
We derive a Hamiltonian formulation of the theory of gauge invariant, linear perturbations in anisotropic Bianchi I spacetimes, and describe how to quantize this system. The matter…
Predictions for the CMB from an anisotropic quantum bounce
Ivan Agullo, Javier Olmedo, V. Sreenath
We introduce an extension of the standard inflationary paradigm on which the big bang singularity is replaced by an anisotropic bounce. Unlike in the big bang model, cosmological p…
Alleviating the Tension in the Cosmic Microwave Background using Planck-Scale Physics
Abhay Ashtekar, Brajesh Gupt, Donghui Jeong +1
Certain anomalies in the CMB bring out a tension between the six-parameter flat CDM model and the CMB data. We revisit the PLANCK analysis with loop quantum cosmology (LQC) pred…