The shape of bouncing universes
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Authors
Barrow, JD
Ganguly, C
Publication Date
2017-10-10Journal Title
International Journal of Modern Physics D
ISSN
1793-6594
Publisher
World Scientific Publishing
Volume
26
Issue
12
Number
1743016
Language
English
Type
Article
This Version
AM
Metadata
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Barrow, J., & Ganguly, C. (2017). The shape of bouncing universes. International Journal of Modern Physics D, 26 (12. 1743016) https://doi.org/10.1142/S0218271817430167
Abstract
What happens to the most general closed oscillating universes in general relativity? We sketch the development of interest in cyclic universes from the early work of Friedmann and Tolman to modern variations introduced by the presence of a cosmological constant. Then we show what happens in the cyclic evolution of the most general closed anisotropic universes provided by the Mixmaster universe. We show that in the presence of entropy increase its cycles grow in size and age, increasingly approaching flatness. But these cycles also grow increasingly anisotropic at their expansion maxima. If there is a positive cosmological constant, or dark energy, present then these oscillations always end and the last cycle evolves from an anisotropic inflexion point towards a de Sitter future of everlasting expansion.
Keywords
Cosmology
Sponsorship
Science and Technology Facilities Council (ST/P000673/1)
Science and Technology Facilities Council (ST/L000636/1)
Identifiers
External DOI: https://doi.org/10.1142/S0218271817430167
This record's URL: https://www.repository.cam.ac.uk/handle/1810/294615
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