An Emergent Universe with Dark Sector Fields in a Chiral Cosmological Model

Беешам, Ароонкумар; Chervon, S. V.; Maharaj, S. D.; Kubasov, A. S.

doi:10.1166/qm.2013.1069

Cited by 24 publications

(26 citation statements)

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“…In the works [3] and [4] we presented a general approach to the EmU from a CCM as the source of the gravitational field. The action of a chiral cosmological model with potential of (self)-interaction V (ϕ) is…”

Section: Basic Equations Of 2-ccmmentioning

confidence: 99%

“…The analysis of the general evolution of the EmU and physical interpretation of the model's parameters was done in [3]. In the infinite past t → −∞, the EmU started off from the radius a i > M −1 P [1] .…”

Section: Basic Equations Of 2-ccmmentioning

confidence: 99%

“…NSMs can be used as the source of the gravitational field, and to try to explain dark matter and dark energy. In the paper [3], we analyzed the EmU scenario with two chiral fields within the framework of a chiral cosmological model (CCM). Obtaining asymptotical solutions in [3] gave us hope of finding exact ones.…”

mentioning

confidence: 99%

“…In the paper [3], we analyzed the EmU scenario with two chiral fields within the framework of a chiral cosmological model (CCM). Obtaining asymptotical solutions in [3] gave us hope of finding exact ones. There it was found that one of the fields should be a phantom one and the other a canonical one.…”

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confidence: 99%

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Exact Inflationary Solutions Inspired by the Emergent Universe Scenario

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We present new classes of exact inflationary solutions for a two-component chiral cosmological model with phantom and canonical scalar fields. These solutions are obtained by use of the scale factor in the form corresponding to that exploited in the emergent universe scenario. We outline in detail the method of deriving exact solutions and discuss the potential and kinetic interaction for the model.

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Section: Basic Equations Of 2-ccmmentioning

confidence: 99%

Section: Basic Equations Of 2-ccmmentioning

confidence: 99%

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confidence: 99%

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Exact Inflationary Solutions Inspired by the Emergent Universe Scenario

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“…Beesham et al [8] found solutions with phantom and canonical scalar fields, including a solution valid for all time. More recently, Beesham et al [9] presented new classes of exact solutions, discussed the potential and kinetic interaction of the chiral fields and calculated key cosmological parameters.…”

Section: Introductionmentioning

confidence: 99%

Emergent universe supported by chiral cosmological fields in 5D Einstein-Gauss-Bonnet gravity

et al. 2014

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We propose the application of the chiral cosmological model (CCM) for the Einstein-Gauss-Bonnet (EGB) theory of gravitation with the aim of finding new models of the Emergent Universe (EmU) scenario. We analysed the EmU supported by two chiral cosmological fields for a spatially flat universe, while we have used three chiral fields when we investigated open and closed universes. To prove the validity of the EmU scenario we fixed the scale factor and found the exact solution by decomposition of EGB equations and solving the chiral field dynamics equation. To this end, we suggested the decomposition of the EGB equations in such a way that the first chiral field is responsible for the Einstein part of the model, while the second field, together with kinetic interaction term, is connected with the Gauss-Bonnet part of the theory. We proved that both fields are phantom ones under this decomposition, and that the model has a solution if the kinetic interaction between the fields equals a constant. We have presented the exact solution in terms of cosmic time. This was done for a spatially flat universe. In the case of open and closed universes we introduced the third chiral field (canonical for closed and phantom for open universe) which is responsible for the EGB and curvature parts. The solution of the third field equation is obtained in quadratures. Thus we have proved that the CCM is able to support EmU scenario in EGB gravity for spatially flat, open and closed universes.

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4D Einstein–Gauss–Bonnet cosmology with Chameleon mechanism

Paliathanasis

2024

Gen Relativ Gravit

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An Emergent Universe with Dark Sector Fields in a Chiral Cosmological Model

Cited by 24 publications

References 0 publications

Exact Inflationary Solutions Inspired by the Emergent Universe Scenario

Exact Inflationary Solutions Inspired by the Emergent Universe Scenario

Emergent universe supported by chiral cosmological fields in 5D Einstein-Gauss-Bonnet gravity

4D Einstein–Gauss–Bonnet cosmology with Chameleon mechanism

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