Results 61 to 70 of about 22,410,258 (325)
European Physical Journal C: Particles and Fields, 2023 Surveys of the matter distribution contain ‘fossil’ information on possible non-Gaussianity that is generated in the primordial Universe. This primordial signal survives only on the largest scales where cosmic variance is strongest.
Sheean Jolicoeur +2 more
doaj +1 more source
Productive interactions: heavy particles and non-Gaussianity [PDF]
Journal of Cosmology and Astroparticle Physics, 2016 We analyze the shape and amplitude of oscillatory features in the primordial power spectrum and non-Gaussianity induced by periodic production of heavy degrees of freedom coupled to the inflaton ϕ.
R. Flauger +3 more
semanticscholar +1 more source
Non-Gaussianity in a matter bounce [PDF]
Journal of Cosmology and Astroparticle Physics, 2009 10 pages, 6 figures, 2 references ...
Cai, Yi-Fu +3 more
openaire +2 more sources
Zoology of graviton non-Gaussianities [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 Abstract We characterize graviton non-Gaussianities in models of inflation where de Sitter boosts are spontaneously broken. We discuss which of the symmetry breaking patterns studied in Nicolis et al., 2015 [1] can sustain a period of quasi de Sitter expansion, and show that the symmetry breaking pattern of Solid Inflation allows the ...
openaire +2 more sources
Constraining inflationary scenarios with braneworld models and second order cosmological perturbations [PDF]
, 2010 PhDInflationary cosmology is the leading explanation of the very early universe. Many different models of inflation have been constructed which fit current observational data.
Huston, Ian
core +2 more sources
Near scale-free dynamics in neural population activity of waking/sleeping rats revealed by multiscale analysis. [PDF]
PLoS ONE, 2010 A neuron embedded in an intact brain, unlike an isolated neuron, participates in network activity at various spatial resolutions. Such multiple scale spatial dynamics is potentially reflected in multiple time scales of temporal dynamics. We identify such
Leonid A Safonov +5 more
doaj +1 more source
Tachyon mediated non-Gaussianity [PDF]
Physical Review D, 2008 We describe a general scenario where primordial non-Gaussian curvature perturbations are generated in models with extra scalar fields. The extra scalars communicate to the inflaton sector mainly through the tachyonic (waterfall) field condensing at the end of hybrid inflation.
Dutta, Bhaskar +2 more
openaire +2 more sources
Primordial Non-Gaussianity [PDF]
, 2019 Meerburg PD, Green D, Abidi M, et al. Primordial Non-Gaussianity. 2019.Our current understanding of the Universe is established through the pristine measurements of structure in the cosmic microwave background (CMB) and the distribution and shapes of ...
Switzer, Eric R. +176 more
core +2 more sources
Primordial Non-Gaussianity in the Large-Scale Structure of the Universe
Advances in Astronomy, 2010 Primordial non-Gaussianity is a potentially powerful discriminant of the physical mechanisms that generated the cosmological fluctuations observed today.
Vincent Desjacques, Uroš Seljak
doaj +1 more source
Savior curvatons and large non-Gaussianity
Journal of High Energy Physics, 2023 Curvatons are light (compared to the Hubble scale during inflation) spectator fields during inflation that potentially contribute to adiabatic curvature perturbations post-inflation.
Jackie Lodman, Qianshu Lu, Lisa Randall
doaj +1 more source