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  Accelerated expansion by non-minimally coupled scalar fields

Bieli, R. (2008). Accelerated expansion by non-minimally coupled scalar fields. In Proceedings of the Eleventh Marcel Grossmann General Relativity (pp. 1767-1769). New Jersey u.a.: World Scientific.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0013-470D-E Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0013-470E-C
Genre: Conference Paper

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 Creators:
Bieli, Roger1, Author           
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1Geometric Analysis and Gravitation, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24012              

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 Abstract: In a class of spatially homogeneous cosmologies including those of Bianchi type I--VIII mathematical results are presented which show that a scalar field non-minimally coupled to the scalar curvature of spacetime can dynamically yield a positive cosmological constant without the potential being required to include one. More precisely, it is shown that in an exponential potential any positive coupling constant leads eventually to late-time de Sitter expansion and isotropization corresponding to a positive cosmological constant and that this behaviour is independent of the steepness of the potential. This is in marked contrast to the minimally coupled case where power-law inflation occurs at most, provided the potential is sufficiently shallow.

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 Dates: 2008
 Publication Status: Issued
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 Identifiers: eDoc: 293671
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Title: 11th Marcel Grossmann meeting
Place of Event: Berlin
Start-/End Date: 2006-07-23 - 2006-07-29

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Title: Proceedings of the Eleventh Marcel Grossmann General Relativity
Source Genre: Proceedings
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Publ. Info: New Jersey u.a. : World Scientific
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 1767 - 1769 Identifier: -