中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Accelerating universe as window for extra dimensions

文献类型:期刊论文

作者Panigrahi, D.; Chatterjee, S.; Zhang, Y. Z.; Chatterjee, S , Jadavpur Univ, Relativ & Cosmol Res Ctr, Calcutta 700032, W Bengal, India
刊名INTERNATIONAL JOURNAL OF MODERN PHYSICS A
出版日期2006
卷号21期号:31页码:6491-6511
关键词Deceleration Cosmology Energy Brane
ISSN号0217-751X
英文摘要Homogeneous cosmological solutions are obtained in five-dimensional (5D) space-time assuming equations of state p = kp and p(1) = gamma p where p is the isotropic 3-pressure and p(1), that for the fifth dimension. Using different values for the constants k and gamma many known solutions are rediscovered. Further the current acceleration of the universe has led us to investigate higher dimensional gravity theory, which is able to explain acceleration from a theoretical viewpoint without the need of introducing dark energy by hand. We also extend a recent work of Mohammedi where using a special form of the extra dimensional scale factor a new interpretation of the higher dimensional equations of motion is given and the concept of an effective 4D pressure is introduced. Interestingly the 5D matter field remains regular while the effective negative pressure is responsible for the inflation. Relaxing the assumptions of two equations of state we also present a class of solutions which provide early deceleration followed by a late acceleration in a unified manner. Relevant to point out that in this case our cosmology apparently mimics the well-known quintessence scenario fuelled by a generalized Chaplygin-type of fluid where a smooth transition from a dust dominated model to a de Sitter-like one takes place. Depending on the relative magnitude of the different constants appearing in our solutions we show that some of the cases are amenable to the desirable property of dimensional reduction.
学科主题Physics
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WOS记录号WOS:000243953800011
公开日期2012-08-02
源URL[http://ir.itp.ac.cn/handle/311006/5814]  
专题理论物理研究所_理论物理所1978-2010年知识产出
通讯作者Chatterjee, S , Jadavpur Univ, Relativ & Cosmol Res Ctr, Calcutta 700032, W Bengal, India
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Panigrahi, D.,Chatterjee, S.,Zhang, Y. Z.,et al. Accelerating universe as window for extra dimensions[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS A,2006,21(31):6491-6511.
APA Panigrahi, D.,Chatterjee, S.,Zhang, Y. Z.,&Chatterjee, S , Jadavpur Univ, Relativ & Cosmol Res Ctr, Calcutta 700032, W Bengal, India.(2006).Accelerating universe as window for extra dimensions.INTERNATIONAL JOURNAL OF MODERN PHYSICS A,21(31),6491-6511.
MLA Panigrahi, D.,et al."Accelerating universe as window for extra dimensions".INTERNATIONAL JOURNAL OF MODERN PHYSICS A 21.31(2006):6491-6511.

入库方式: OAI收割

来源:理论物理研究所

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