The Quest for a Realistic Four-dimensional Cosmology

Authors

  • Ishwaree P Neupane Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch

DOI:

https://doi.org/10.3126/hj.v1i0.5168

Keywords:

Cosmology

Abstract

The existence of a small and positive cosmological constant attributed to gravitational vacuum energy (or dark energy) in the present-day universe appears to be the most pressing obstacle as well as opportunity to significantly improving the models of four-dimensional cosmology from fundamental theories of gravity, including string theory and modern Kaluza-Klein theories. In seeking to resolve this problem, one naturally wonders if the real world can somehow be interpreted as an inflating de Sitter "brane" embedded in a five or even higher-dimensional space-time described by warped or non-factorizable geometry. In this scenario, the four-dimensional cosmological constant may well be determined in terms of two length scales: one is a scale associated with the size of extra dimensions and the other is a scale associated with the expansion rate of the universe, which is also related to the warping of extra spaces.

Key words: Cosmology

The Himalayan Physics

Vol.1, No.1, May, 2010

Page: 18-24

Uploaded Date: 28 July, 2011

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Published

2011-07-27

How to Cite

Neupane, I. P. (2011). The Quest for a Realistic Four-dimensional Cosmology. Himalayan Physics, 1, 18–24. https://doi.org/10.3126/hj.v1i0.5168

Issue

Vol. 1 (2010)

Section

Articles

License

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