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APS » Phys. Rev. D » Volume 75 » Issue 12

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Phys. Rev. D 75, 123513 (2007) [8 pages]

String inspired explanation for the superacceleration of our Universe

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Ahmad Sheykhi,^1,2,3 Bin Wang,¹ and Nematollah Riazi³
¹Department of Physics, Fudan University, Shanghai 200433, China
²Department of Physics, Shahid Bahonar University, Kerman, Iran
³Physics Department and Biruni Observatory, Shiraz University, Shiraz 71454, Iran

Received 6 April 2007; published 20 June 2007

Weinvestigate the effect of the bulk content in the generalGauss-Bonnet braneworld on the evolution of the Universe. We findthat the Gauss-Bonnet term and the combination of the darkradiation and the matter content of the bulk play acrucial role in the Universe's evolution. We show that ourmodel can describe the superacceleration of our Universe with theequation of state of the effective dark energy in agreementwith observations.

©2007 The American Physical Society

URL:	http://link.aps.org/doi/10.1103/PhysRevD.75.123513
DOI:	10.1103/PhysRevD.75.123513
PACS:	98.80.Cq; 98.80.-k 98.80.Cq Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.) 98.80.-k Cosmology YEAR: 2007

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