Change search
ReferencesLink to record
Permanent link

Direct link
Scalar field deformations of Lambda CDM cosmology
Univ Lisbon, Inst Super Tecn, Ctr Math Anal Geometry & Dynam Syst, P-1049001 Lisbon, Portugal..
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Physics.
2015 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 92, no 10, 103502Article in journal (Refereed) PublishedText
Abstract [en]

This paper treats nonrelativistic matter and a scalar field phi with a monotonically decreasing potential minimally coupled to gravity in flat Friedmann-Lemaitre-Robertson-Walker cosmology. The field equations are reformulated as a three-dimensional dynamical system on an extended compact state space, complemented with cosmographic diagrams. A dynamical systems analysis provides global dynamical results describing possible asymptotic behavior. It is shown that one should impose global and asymptotic bounds on lambda = -V-1 dV/d phi to obtain viable cosmological models that continuously deform Lambda CDM cosmology. In particular we introduce a regularized inverse power-law potential as a simple specific example.

Place, publisher, year, edition, pages
2015. Vol. 92, no 10, 103502
Keyword [en]
SCALING SOLUTIONS; POTENTIALS
National Category
Physical Sciences
Research subject
Physics
Identifiers
URN: urn:nbn:se:kau:diva-40685DOI: 10.1103/PhysRevD.92.103502ISI: 000364020800003OAI: oai:DiVA.org:kau-40685DiVA: diva2:906607
Available from: 2016-02-24 Created: 2016-02-24 Last updated: 2016-02-24Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Uggla, Claes
By organisation
Department of Engineering and Physics
In the same journal
Physical Review D
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 54 hits
ReferencesLink to record
Permanent link

Direct link