PIRSA:06050000 Scientific Series Cosmology

DOI10.48660/06050000

Series: Cosmology and Gravitation

Germani, C. (2006). Mirage Inflation. Perimeter Institute. https://pirsa.org/06050000

Germani, Cristiano. Mirage Inflation. Perimeter Institute, May. 02, 2006, https://pirsa.org/06050000 

@misc{ pirsa_PIRSA:06050000,
  doi = {10.48660/06050000},
  url = {https://pirsa.org/06050000},
  author = {Germani, Cristiano},
  keywords = {Cosmology},
  language = {en},
  title = {Mirage Inflation},
  publisher = {Perimeter Institute},
  year = {2006},
  month = {may},
  note = {PIRSA:06050000 see, \url{https://pirsa.org}}
}

Abstract

A cosmological model based on an inhomogeneous D3-brane moving in an AdS_5 X S_5 bulk is introduced. Although there is no special points in the bulk, the brane Universe has a center and is isotropic around it. The model has an accelerating expansion and its effective cosmological constant is inversely proportional to the distance from the center, giving a possible geometrical origin for the smallness of a present-day cosmological constant. Besides, if our model is considered as an alternative of early time acceleration, it is shown that the early stage accelerating phase ends in a dust dominated FRW homogeneous Universe. Mirage-driven acceleration thus provides a dark matter component for the brane Universe final state. We finally show that the model fulfills the current constraints on inhomogeneities.

Resources

Next talk

Related Talks