STOCHASTIC FLUCTUATIONS AND STRUCTURE FORMATION IN THE UNIVERSE

被引：43

作者：

BERERA, A ^{[1
]}

FANG, LZ ^{[1
]}

机构：

[1] UNIV ARIZONA,STEWARD OBSERV,TUCSON,AZ 85721

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.72.458

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

It is shown that the evolution of the density perturbations during certain eras of substantial entropy generation in the Universe can be described using the Kardar-Parisi-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 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.

引用

页码：458 / 461

页数：4

共 14 条

[1] GAUGE-INVARIANT COSMOLOGICAL PERTURBATIONS [J].