Results 31 to 40 of about 6,708 (120)
Constraining running non-gaussianity [PDF]
Journal of Cosmology and Astroparticle Physics, 2009 The primordial non-Gaussian parameter fNL has been shown to be scale-dependent in several models of inflation with a variable speed of sound. Starting from a simple ansatz for a scale-dependent amplitude of the primordial curvature bispectrum for two common phenomenological models of primordial non-Gaussianity, we perform a Fisher matrix analysis of ...
Emiliano Sefusatti +4 more
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Nihon Kikai Gakkai ronbunshu, 2015 Equivalent non-Gaussian excitation method is developed to obtain the statistical moments up to 4th order of the response of non-Gaussian randomly excited systems. The non-Gaussian excitation is prescribed by the probability density function and the power
Takahiro TSUCHIDA, Koji KIMURA
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Observation impact in data assimilation: the effect of non-Gaussian observation error [PDF]
Tellus: Series A, Dynamic Meteorology and Oceanography, 2013 Data assimilation methods which avoid the assumption of Gaussian error statistics are being developed for geoscience applications. We investigate how the relaxation of the Gaussian assumption affects the impact observations have within the assimilation ...
Alison Fowler, Peter Jan Van Leeuwen
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International Journal of Metrology and Quality EngineeringIn mechanical, civil and chemical engineering systems the accuracies of flow measurement instruments is conventionally specified by certified measurement capabilities (CMCs) that are symmetric, however it is physically possible for some flow instruments ...
Ramnath Vishal
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Physical Review Research, 2021 Gaussian states and measurements collectively are not powerful-enough resources for quantum computing, as any Gaussian dynamics can be simulated efficiently, classically.
Christos N. Gagatsos, Saikat Guha
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On the non-Gaussianity from recombination [PDF]
Journal of Cosmology and Astroparticle Physics, 2009 The non-linear effects operating at the recombination epoch generate a non-Gaussian signal in the CMB anisotropies. Such a contribution is relevant because it represents a major part of the second-order radiation transfer function which must be determined in order to have a complete control of both the primordial and non-primordial part of non ...
BARTOLO, NICOLA, A. RIOTTO
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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 ...
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Non-Gaussianity in island cosmology [PDF]
Physical Review D, 2009 5 pages, 1 eps figure, some discussions added, published ...
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Anomalous dimensions and non-gaussianity [PDF]
Journal of High Energy Physics, 2013 AbstractWe analyze the signatures of inflationary models that are coupled to interacting field theories, a basic class of multifield models also motivated by their role in providing dynamically small scales. Near the squeezed limit of the bispectrum, we find a simple scaling behavior determined by operator dimensions, which are constrained by the ...
Green, Daniel +4 more
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Polymerization Induces Non-Gaussian Diffusion
Frontiers in Physics, 2019 Recent theoretical modeling offers a unified picture for the description of stochastic processes characterized by a crossover from anomalous to normal behavior.
Fulvio Baldovin +2 more
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