1994/01/14 by Arjun Berera, A. Berera, Li-Zhi Fang +1 · 1 citation
Economics, Econometrics and Finance · Physics and Astronomy · #Classical mechanics #Complex Systems and Time Series Analysis #Cosmic microwave background #Cosmology and Gravitation Theories #Dissipative system #Entropy (arrow of time) #Perturbation (astronomy) #Physics #Primordial fluctuations #Quantum #Quantum fluctuation #Quantum mechanics #Spectral density #Statistical physics #Structure formation #Theoretical and Computational Physics #Theoretical physics #Universe #astro-ph
paper · pdf · doi:10.1103/physrevlett.72.458
published as Phys.Rev.Lett. 72 (1994) 458-461 · 14 pages, Latex, Phys.Rev.Lett. in press, From Dept of Physics, University of Arizona
arxiv created 1994/01/14 · openalex publication_date 1994/01/24 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 Kardar-Parizi-Zhang 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.