scholarly journals Erratum: on the generation of a non-gaussian curvature perturbation during preheating

2010 ◽  
Vol 2010 (09) ◽  
pp. E01-E01 ◽  
Author(s):  
Kazunori Kohri ◽  
David H Lyth ◽  
Cesar A Valenzuela-Toledo
Keyword(s):  
Gaussian Curvature ◽  
Curvature Perturbation ◽  
Non Gaussian

On the generation of a non-gaussian curvature perturbation during preheating

2010 ◽  
Vol 2010 (02) ◽  
pp. 023-023 ◽  
Author(s):  
Kazunori Kohri ◽  
David H Lyth ◽  
Cesar A Valenzuela-Toledo
Keyword(s):  
Gaussian Curvature ◽  
Curvature Perturbation ◽  
Non Gaussian

scholarly journals Non-Gaussian curvature distribution of actin-propelled biomimetic colloid trajectories

2008 ◽  
Vol 37 (8) ◽  
pp. 1361-1366 ◽  
Author(s):  
Stephan Schmidt ◽  
Jasper van der Gucht ◽  
P. Maarten Biesheuvel ◽  
Richard Weinkamer ◽  
Emmanuèle Helfer ◽  
...  
Keyword(s):  
Gaussian Curvature ◽  
Non Gaussian ◽  
Curvature Distribution

scholarly journals PRIMORDIAL BLACK HOLE CONSTRAINTS FOR CURVATON MODELS WITH PREDICTED LARGE NON-GAUSSIANITY

2013 ◽  
Vol 22 (07) ◽  
pp. 1350034 ◽  
Author(s):  
E. V. BUGAEV ◽  
P. A. KLIMAI
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Power Spectrum ◽  
Mass Spectra ◽  
Primordial Black Hole ◽  
Primordial Black Holes ◽  
Curvature Perturbation ◽  
Small Scales ◽  
Non Gaussian ◽  
Spectrum Amplitude

We consider the early Universe scenario which allows for production of non-Gaussian curvature perturbations at small scales. We study the peculiarities of a formation of primordial black holes (PBHs) connected with the non-Gaussianity. In particular, we show that PBH constraints on the values of curvature perturbation power spectrum amplitude are strongly dependent on the shape of perturbations and can significantly (by two orders of magnitude) deviate from the usual Gaussian limit [Formula: see text]. We give examples of PBH mass spectra calculations and PBH constraints for the particular case of the curvaton model.

Statistics of cosmological fields

2014 ◽  
Vol 10 (S306) ◽  
pp. 116-123
Author(s):  
Sabino Matarrese
Keyword(s):  
Early Universe ◽  
General Problem ◽  
Point Of View ◽  
Theoretical Point ◽  
Future Prospects ◽  
Cosmological Perturbations ◽  
Curvature Perturbation ◽  
Perturbation Field ◽  
Non Gaussian

AbstractThe general problem of the statistics of the primordial curvature perturbation field in cosmology is reviewed. The search for non-Gaussian signatures in cosmological perturbations, originated from inflation in the early Universe is discussed both from the theoretical point of view and in connection with constraints coming from recent observations and future prospects for observing/constraining them.

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