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题名: Accelerating universe as window for extra dimensions
作者: Panigrahi, D. ;  Chatterjee, S. ;  Zhang, Y. Z.
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
学科分类: Physics
通讯作者: Chatterjee, S , Jadavpur Univ, Relativ & Cosmol Res Ctr, Calcutta 700032, W Bengal, India
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
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.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000243953800011
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内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5814
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Panigrahi, D.,Chatterjee, S.,Zhang, Y. Z.. Accelerating universe as window for extra dimensions[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS A,2006,21(31):6491-6511.
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