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Global cosmological dynamics for the scalar field representation of the modified Chaplygin gas
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Physics. (Fysik)
2013 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. D88, 064040-1-064040-7 p.Article in journal (Refereed) Published
Abstract [en]

In this paper we investigate the global dynamics for the minimally coupled scalar field representation of the modified Chaplygin gas in the context of flat Friedmann-LemaƮtre-Robertson Walker cosmology. The tool for doing this is a new set of bounded variables that lead to a regular dynamical system. It is shown that the exact modified Chaplygin gas perfect fluid solution appears as a straight line in the associated phase plane. It is also shown that no other solutions stay close to this solution during their entire temporal evolution, but that there exists an open subset of solutions that stay arbitrarily close during an intermediate time interval, and into the future in the case when the scalar field potential exhibits a global minimum.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2013. Vol. D88, 064040-1-064040-7 p.
Keyword [en]
Cosmology
National Category
Natural Sciences Physical Sciences
Research subject
Physics
Identifiers
URN: urn:nbn:se:kau:diva-30483DOI: 10.1103/PhysRevD.88.064040ISI: 000324635700005OAI: oai:DiVA.org:kau-30483DiVA: diva2:668501
Available from: 2013-11-30 Created: 2013-11-30 Last updated: 2016-08-25Bibliographically approved

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Uggla, Claes
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