Field theory model for dark matter and dark energy in interaction

Micheletti, S.; Abdalla, Élcio; Wang, Bin

doi:10.1103/physrevd.79.123506

Cited by 100 publications

(117 citation statements)

References 54 publications

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“…Later on, Wetterich [5], Micheletti, Abdalla, and Wang [6], Polyakov [7], and Abdalla, Graef, and Wang [8], among others, reinforced the theoretical framework. As we write, the number of proposals (both from the theoretical as well as from the phenomenological side) has been greatly augmented -see e.g.…”

Section: Introductionmentioning

confidence: 92%

On detecting interactions in the dark sector withH(z)data

2013

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An interesting approach to the cosmological coincidence problem is to allow dark matter and dark energy interact with each other also nongravitationally. We consider two general Ansätze for such an interaction and appraise their ability to address the coincidence problem. We determine the average accuracy required on the cosmic expansion rate data to distinguish interacting cosmological models from the conventional ΛCDM scenario. We find that among the planned surveys the Wide Field Infrared Survey Telescope has the best chance to detect an interaction, though at a low significance level. To unambiguously determine the existence of an interaction one must, therefore, combine the said expansion data with other probes.PACS numbers: 98.80.-k, 95.35.+d, 95.36.+x

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Section: Introductionmentioning

confidence: 92%

On detecting interactions in the dark sector withH(z)data

2013

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“…Since we know the nature of neither DM nor DE, it is hard to describe the interaction between them, although there are some attempts on this task [27][28][29][30]. Our study on the interaction between dark sectors will concentrate on the phenomenological descriptions.…”

Section: Analytical Formalismmentioning

confidence: 99%

Early dark energy and its interaction with dark matter

Wang

et al. 2015

Phys. Rev. D

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We study a class of early dark energy models which has substantial amount of dark energy in the early epoch of the universe. We examine the impact of the early dark energy fluctuations on the growth of structure and the CMB power spectrum in the linear approximation.Furthermore we investigate the influence of the interaction between the early dark energy and the dark matter and its effect on the structure growth and CMB. We finally constrain the early dark energy model parameters and the coupling between dark sectors by confronting to different observations.

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“…We have to solve Friedmann's equations, the equation of motion for the scalar field, and the Dirac equation. We know that the homogeneous Dirac equation in a homogeneous and isotropic spacetime has a simple solution in terms of the scale factor, and we can see that " c c ¼ =a 3 , where is a constant related to the energy density of the dark matter at the present phase of the history of the Universe [30]. Therefore, the system of equations that remains to be solved is…”

Section: Interacting Dark Energy and Dark Matter Modelmentioning

confidence: 99%

Exact cosmological solutions of models with an interacting dark sector

Ferreira¹,

Pavan²,

Micheletti³

et al. 2013

Proceedings of VIII International Workshop on the Dark Side of the Universe — PoS(DSU 2012)

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In this work we extend the first order formalism for cosmological models that present an interaction between a fermionic and a scalar field. Cosmological exact solutions describing universes filled with interacting dark energy and dark matter have been obtained. Viable cosmological solutions with an early period of decelerated expansion followed by late acceleration have been found, notably one which presents a dark matter component dominating in the past and a dark energy component dominating in the future. In another one, the dark energy alone is the responsible for both periods, similar to a Chaplygin gas case. Exclusively accelerating solutions have also been obtained.

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Field theory model for dark matter and dark energy in interaction

Cited by 100 publications

References 54 publications

On detecting interactions in the dark sector withH(z)data

On detecting interactions in the dark sector withH(z)data

Early dark energy and its interaction with dark matter

Exact cosmological solutions of models with an interacting dark sector

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