String inspired explanation for the superacceleration of our Universe

Ahmad Sheykhi, Bin Wang, and Nematollah Riazi
Phys. Rev. D 75, 123513 – Published 20 June 2007

Abstract

We investigate the effect of the bulk content in the general Gauss-Bonnet braneworld on the evolution of the Universe. We find that the Gauss-Bonnet term and the combination of the dark radiation and the matter content of the bulk play a crucial role in the Universe’s evolution. We show that our model can describe the superacceleration of our Universe with the equation of state of the effective dark energy in agreement with observations.

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  • Received 6 April 2007

DOI:https://doi.org/10.1103/PhysRevD.75.123513

©2007 American Physical Society

Authors & Affiliations

Ahmad Sheykhi1,2,3,*, Bin Wang1,†, 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

  • *asheykhi@mail.uk.ac.ir
  • wangb@fudan.edu.cn
  • riazi@physics.susc.ac.ir

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Issue

Vol. 75, Iss. 12 — 15 June 2007

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