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Multidimensional inhomogeneous cosmology in scalar tensor theory
Panigrahi, D; Chatterjee, S; Zhang, YZ; Panigrahi, D , Jadavpur Univ, Relativ & Cosmol Res Ctr, Calcutta 700032, W Bengal, India.
2005
发表期刊INTERNATIONAL JOURNAL OF MODERN PHYSICS D
ISSN0218-2718
卷号14期号:6页码:1083-1094
摘要Exact cosmological solutions are obtained for a five-dimensional inhomogeneous fluid distribution along with a Brans-Dicke type of scalar field. The set includes varied forms of matter field including p+p = 0, where p is the 3D isotropic pressure. Depending on the signature of 4-space curvature, our solutions admit of indefinite expansion in the usual 3-space and dimensional reduction of the fifth dimension. Due to the presence of the scalar field, the case p = -p does not yield an exponential expansion of the scale factor, which strikingly differs from our earlier investigations without scalar field. The effective four-dimensional values of entropy and matter axe calculated and possible consequences of entropy and matter generation in the 4D world as a result of dimensional reduction of the extra space are also discussed. It is encouraging to point out that aside from the well known big bang singularity, our inhomogeneous cosmology is spatially regular everywhere. Further, our model seems to suggest an alternative mechanism pointing to a smooth pass over from a primordial, inhomogeneous cosmological phase to a 4D homogeneous one.
部门归属Jadavpur Univ, Relativ & Cosmol Res Ctr, Calcutta 700032, W Bengal, India; Chinese Acad Sci, Inst Theoret Phys, Beijing, Peoples R China
关键词Dimensions Universe Models
学科领域Physics
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收录类别SCI
WOS记录号WOS:000231191200014
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13815
专题理论物理所SCI论文
通讯作者Panigrahi, D , Jadavpur Univ, Relativ & Cosmol Res Ctr, Calcutta 700032, W Bengal, India.
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Panigrahi, D,Chatterjee, S,Zhang, YZ,et al. Multidimensional inhomogeneous cosmology in scalar tensor theory[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS D,2005,14(6):1083-1094.
APA Panigrahi, D,Chatterjee, S,Zhang, YZ,&Panigrahi, D , Jadavpur Univ, Relativ & Cosmol Res Ctr, Calcutta 700032, W Bengal, India..(2005).Multidimensional inhomogeneous cosmology in scalar tensor theory.INTERNATIONAL JOURNAL OF MODERN PHYSICS D,14(6),1083-1094.
MLA Panigrahi, D,et al."Multidimensional inhomogeneous cosmology in scalar tensor theory".INTERNATIONAL JOURNAL OF MODERN PHYSICS D 14.6(2005):1083-1094.
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