PMO OpenIR  > 分子云与恒星形成研究团组
Metric-affine formalism of higher derivative scalar fields in cosmology
Li, Mingzhe1; Wang, Xiulian
2012-07-01
Source PublicationJOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
ISSN1475-7516
Issue7Pages:010
AbstractHigher derivative scalar field theories have received considerable attention for the potentially explanations of the initial state of the universe or the current cosmic acceleration which they might offer. They have also attracted many interests in the phenomenological studies of infrared modifications of gravity. These theories are mostly studied by the metric variational approach in which only the metric is the fundamental field to account for the gravitation. In this paper we study the higher derivative scalar fields with the metric-affine formalism where the affine connection is treated arbitrarily at the beginning. Because the higher derivative scalar fields couple to the connection directly in a covariant theory these two formalisms will lead to different results. These differences are suppressed by the powers of the Planck mass and are usually expected to have small effects. But in some cases they may cause non-negligible deviations. We show by a higher derivative dark energy model that the two formalisms lead to significantly different pictures of the future universe.
KeywordDark Energy Theory Gravity
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/1475-7516/2012/07/010
WOS KeywordVARIATIONAL-PRINCIPLES ; INFLATIONARY UNIVERSE ; GENERAL-RELATIVITY ; DARK ENERGY ; SPACE ; SUPERGRAVITY ; FLATNESS ; HORIZON
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000307079600045
Citation statistics
Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8009
Collection分子云与恒星形成研究团组
Affiliation1.Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China
2.Nanjing Univ, Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Li, Mingzhe,Wang, Xiulian. Metric-affine formalism of higher derivative scalar fields in cosmology[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2012(7):010.
APA Li, Mingzhe,&Wang, Xiulian.(2012).Metric-affine formalism of higher derivative scalar fields in cosmology.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(7),010.
MLA Li, Mingzhe,et al."Metric-affine formalism of higher derivative scalar fields in cosmology".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .7(2012):010.
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