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  Loop Quantum Gravity and the Cyclic Universe

Bojowald, M., Maartens, R., & Singh, P. (2004). Loop Quantum Gravity and the Cyclic Universe. Physical Review D, 70: 083517. Retrieved from http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRVDAQ000070000008083517000001&idtype=cvips&gifs=yes.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-5172-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-5173-6
Genre: Journal Article

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195048.pdf (Preprint), 262KB
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 Creators:
Bojowald, Martin1, Author
Maartens, Roy, Author
Singh, Parampreet, Author
Affiliations:
1Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24014              

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 Abstract: Loop quantum gravity introduces strong non-perturbative modifications to the dynamical equations in the semi-classical regime, which are responsible for various novel effects, including resolution of the classical singularity in a Friedman universe. Here we investigate the modifications for the case of a cyclic universe potential, assuming that we can apply the four-dimensional loop quantum formalism within the effective four-dimensional theory of the cyclic scenario. We find that loop quantum effects can dramatically alter the near-collision dynamics of the cyclic scenario. In the kinetic-dominated collapse era, the scalar field is effectively frozen by loop quantum friction, so that the branes approach collision and bounce back without actual collision.

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Language(s): eng - English
 Dates: 2004
 Publication Status: Published in print
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Title: Physical Review D
Source Genre: Journal
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Pages: - Volume / Issue: 70 Sequence Number: 083517 Start / End Page: - Identifier: -