Stochastic fluctuations and structure formation in the Universe

Abstract

It is shown that the evolution of the density perturbations during certain eras of substantial entropy generation in the universe can be described in the scheme of the KPZ equation. Therefore, the influence on cosmological structure formation by stochastic forces arising from various dissipations can be studied through the universal characteristics of surface growth in $d=3+1$ dimensions. We identify eras of strong stochastic fluctuations and describe dynamically how these other dissipative sources of noise, besides initial (inflationary) quantum fluctuations, generate seeds of density perturbation with power law spectrum, including the Harrison-Zeldovich spectrum.

14 pages, Latex, Phys.Rev.Lett. in press, From Dept of Physics, University of Arizona

Cited by in corpus (31)

• Warm Inflation
• Thermally Induced Density Perturbations in the Inflation Era
• Adhesive Gravitational Clustering
• Effective action for stochastic partial differential equations
• Mass Density Perturbations from Inflation with Thermal Dissipation
• Temperature and Entropy Fields of Baryonic Gas in the Universe
• Low-Redshift Cosmic Baryon Fluid on Large Scales and She-Leveque Universal Scaling
• Distributions of the Baryon Fraction on Large Scales in the Universe
• Dynamical Effect of the Turbulence of IGM on the Baryon Fraction Distribution
• Intermittent Features of the QSO Ly$\alpha$ Transmitted Flux: Results from Hydrodynamic Cosmological Simulations
• Non-Gaussian Features of Transmitted Flux of QSO's Ly$\alpha$ Absorption: Intermittent Exponent
• Dynamical Critical Phenomena and Large Scale Structure of the Universe: the Power Spectrum for Density Fluctuations
• Hydrogen Clouds before Reionization: a Lognormal Model Approach
• Scale Invariance of Rich Cluster Abundance: A Possible Test for Models of Structure Formation
• Non-Gaussianity of the Cosmic Baryon Fluid: Log-Poisson Hierarchy Model
• The velocity field of baryonic gas in the universe
• Growth-induced breaking and unbreaking of ergodicity in fully-connected spin systems
• The Statistical Discrepancy between the IGM and Dark Matter Fields: One-Point Statistics
• Effective potential for the massless KPZ equation
• Renormalization Group Analysis of a Quivering String Model of Posture Control
• The adhesion model as a field theory for cosmological clustering
• Scaling Laws in the Cosmic Structure and Renormalization Group
• Is the cosmic UV background fluctuating at redshift z ~ 6 ?
• Log-Poisson Hierarchical Clustering of Cosmic Neutral Hydrogen and Ly-alpha Transmitted Flux of QSO Absorption Spectrum
• X-ray Emission of Baryonic Gas in the Universe: Luminosity-Temperature Relationship and Soft-Band Background
• Small-scale properties of the KPZ equation and dynamical symmetry breaking
• Scaling Relation between Sunyaev-Zel'dovich Effect and X-ray Luminosity and Scale-Free Evolution of Cosmic Baryon Field
• Statistical and dynamical decoupling of the IGM from Dark Matter
• Nonlinear field theories during homogeneous spatial dilation
• Ly$\alpha$ Leaks and Reionization
• Stochastic evolution of cosmological parameters in the early universe