Renormalized Newtonian Cosmic Evolution with Primordial Non-Gaussianity

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dc.creatorIzumi, Keisuke
dc.creatorSoda, Jiro
dc.date2007-06-12
dc.date2007-06-13
dc.date.accessioned2026-07-07T12:13:33Z
dc.date.available2026-07-07T12:13:33Z
dc.descriptionWe study Newtonian cosmological perturbation theory from a field theoretical point of view. We derive a path integral representation for the cosmological evolution of stochastic fluctuations. Our main result is the closed form of the generating functional valid for any initial statistics. Moreover, we extend the renormalization group method proposed by Mataresse and Pietroni to the case of primordial non-Gaussian density and velocity fluctuations. As an application, we calculate the nonlinear propagator and examine how the non-Gaussianity affects the memory of cosmic fields to their initial conditions. It turns out that the non-Gaussianity affect the nonlinear propagator. In the case of positive skewness, the onset of the nonlinearity is advanced with a given comoving wavenumber. On the other hand, the negative skewness gives the opposite result.
dc.description12 pages, 2 figures
dc.identifierhttps://arxiv.org/abs/0706.1604
dc.identifierhttp://arxiv.org/abs/0706.1604
dc.identifierPhys.Rev.D76:083517,2007
dc.identifierdoi:10.1103/PhysRevD.76.083517
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/210886
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.titleRenormalized Newtonian Cosmic Evolution with Primordial Non-Gaussianity
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