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Quasi-Topological Cosmology from Emergence of Cosmic Space |
| Ahmad Sheykhi** |
Physics Department and Biruni Observatory, College of Sciences, Shiraz University, Shiraz 71454, Iran Research Institute for Astronomy and Astrophysics of Maragha (RIAAM), P. O. Box 55134-441, Maragha, Iran
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| Cite this article: |
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Ahmad Sheykhi 2014 Chin. Phys. Lett. 31 020401 |
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Abstract We show that one can always derive the Friedmann equation of an (n+1)-dimensional Friedmann–Robertson–Walker universe in cubic quasi-topological gravity, by determining the difference between the bulk and the apparent horizon degrees of freedom in a region of space. We also generalize the study to the higher-order quasi-topological gravity, and extract the corresponding Friedmann equation in this theory by using the same approach.
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Received: 24 September 2013
Published: 28 February 2014
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| PACS: |
04.20.Cv
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(Fundamental problems and general formalism)
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04.50.-h
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(Higher-dimensional gravity and other theories of gravity)
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04.70.Dy
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(Quantum aspects of black holes, evaporation, thermodynamics)
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