Emergent universe in spatially flat cosmological model

被引：23

作者：

Zhang, Kaituo ^{[1
,2
]}

Wu, Puxun ^{[3
,4
,5
]}

Yu, Hongwei ^{[1
,2
,3
,4
,5
]}

机构：

[1] Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China

[2] Hunan Normal Univ, Minist Educ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China

[3] Ningbo Univ, Ctr Nonlinear Sci, Ningbo 315211, Zhejiang, Peoples R China

[4] Ningbo Univ, Dept Phys, Ningbo 315211, Zhejiang, Peoples R China

[5] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2014年 / 01期

基金：

中国国家自然科学基金;

关键词：

cosmic singularity; physics of the early universe; EINSTEIN STATIC UNIVERSE; STABILITY; WORLD; DISAPPEARANCE; DIMENSIONS; GRAVITY; LOOP;

D O I：

10.1088/1475-7516/2014/01/048

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The scenario of an emergent universe provides a promising resolution to the big bang singularity in universes with positive or negative spatial curvature. It however remains unclear whether the scenario can be successfully implemented in a spatially flat universe which seems to be favored by present cosmological observations. In this paper, we study the stability of Einstein static state solutions in a spatially flat Shtanov-Sahni braneworld scenario. With a negative dark radiation term included and assuming a scalar field as the only matter energy component, we find that the universe can stay at an Einstein static state past eternally and then evolve to an inflation phase naturally as the scalar field climbs up its potential slowly. In addition, we also propose a concrete potential of the scalar field that realizes this scenario.

引用

页数：14

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