Large scale anomalies in the CMB and non-Gaussianity in bouncing cosmologies
Sign Up to like & getrecommendations! Published in 2020 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/abc521
Abstract: 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 era. The bounce… read more here.
Keywords: large scale; anomalies cmb; non gaussianity; cmb non ... See more keywords
Enhanced continuous generation of non-Gaussianity through optomechanical modulation
Sign Up to like & getrecommendations! Published in 2019 at "New Journal of Physics"
DOI: 10.1088/1367-2630/ab1b9e
Abstract: We study the non-Gaussian character of quantum optomechanical systems evolving under the fully nonlinear optomechanical Hamiltonian. By using a measure of non-Gaussianity based on the relative entropy of an initially Gaussian state, we quantify the… read more here.
Keywords: generation non; non gaussianity; enhanced continuous; gaussianity optomechanical ... See more keywords
Primordial non-Gaussianity from G-inflation
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/04/045
Abstract: Enormous information about interactions is contained in the non-Gaussianities of the primordial curvature perturbations, which are essential to break the degeneracy of inflationary models. We study the primordial bispectra for G-inflation models predicting both sharp… read more here.
Keywords: non gaussianity; primordial non; gaussianity; power spectrum ... See more keywords
Non-Gaussianity in a general kind noncanonical warm inflation
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.100.123521
Abstract: The general kind noncanonical warm inflation is introduced and its total non-Gaussianity of perturbation on uniform energy density hypersurfaces is studied. The total non-Gaussianity contains two complementary parts: the three- and the four-point correlations. The… read more here.
Keywords: non gaussianity; gaussianity; warm inflation; noncanonical warm ... See more keywords
Double-peaked inflation model: Scalar induced gravitational waves and primordial-black-hole suppression from primordial non-Gaussianity
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review D"
DOI: 10.1103/physrevd.104.063515
Abstract: A significant abundance of primordial black hole (PBH) dark matter can be produced by curvature perturbations with power spectrum ∆ζ(kpeak) ∼ O(10−2) at small scales, associated with the generation of observable scalar induced gravitational waves… read more here.
Keywords: non gaussianity; inflation; model; kpeak kpeak ... See more keywords
A Unifying Objective Function of Independent Component Analysis for Ordering Sources by Non-Gaussianity
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Transactions on Neural Networks and Learning Systems"
DOI: 10.1109/tnnls.2018.2806959
Abstract: The independent component analysis (ICA) is a widely used method for solving blind separation problems. The ICA assumes that the sources are independent of each other and extracts them by maximizing their non-Gaussianity as the… read more here.
Keywords: non gaussianity; independent component; objective function; gaussianity ... See more keywords
The Fourfold Way to Gaussianity: Physical Interactions, Distributional Models and Monadic Transformations
Sign Up to like & getrecommendations! Published in 2023 at "Axioms"
DOI: 10.3390/axioms12030278
Abstract: The Central Limit Theorem stands as a milestone in probability theory and statistical physics, as the privileged, if not the unique, universal route to normal distributions. This article addresses and describes several other alternative routes… read more here.
Keywords: monadic transformations; physical interactions; physics; fourfold way ... See more keywords