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Holography, the cosmological constant and the upper limit of the number of e-foldings
Cai, RG; Cai, RG , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
2004
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
ISSN1475-7516
期号2页码:-
摘要If the source of the current accelerating expansion of the universe is a positive cosmological constant, Banks and Fischler argued that there exists an upper limit of the total number of e-foldings of inflation. We further elaborate on the upper limit in the sense of viewing the cosmological horizon as the boundary of a cavity and of the holographic D-bound in a de Sitter space. Assuming a simple evolution model of inflation, we obtain an expression of the upper limit in terms of the cosmological constant, the energy density of the inflaton when the inflation starts, the energy density as the inflation ends and reheating temperature. We discuss how the upper limit is modified in the different evolution models of the universe. The holographic D-bound gives a higher upper limit than the entropy threshold in the cavity. For the most extreme case where the initial energy density of inflation is as high as the Planck energy, and the reheating temperature is as low as the energy scale of nucleosynthesis, the D-bound gives the upper limit as 146 and the entropy threshold as 122. For a reasonable assumption in the simplest cosmology, the holographic D-bound leads to a value of about 85, while the cavity model gives a value of around 65 for the upper limit, which is close to the value needed to solve the flatness problem and the horizon problem in the hot big bang cosmology.
部门归属Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Probe Wmap Observations Inflationary Universe Parameters Supernovae
学科领域Physics
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收录类别SCI
WOS记录号WOS:000189361800007
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被引频次:12[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/14133
专题理论物理所SCI论文
通讯作者Cai, RG , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
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Cai, RG,Cai, RG , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.. Holography, the cosmological constant and the upper limit of the number of e-foldings[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2004(2):-.
APA Cai, RG,&Cai, RG , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China..(2004).Holography, the cosmological constant and the upper limit of the number of e-foldings.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(2),-.
MLA Cai, RG,et al."Holography, the cosmological constant and the upper limit of the number of e-foldings".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .2(2004):-.
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