Phantom dark energy with varying-mass dark matter particles: Acceleration and cosmic coincidence problem

León, Genly; Saridakis, Emmanuel N.

doi:10.1016/j.physletb.2010.08.016

Cited by 60 publications

(42 citation statements)

References 86 publications

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“…This is known as the famous cosmic coincidence problem. till date several attempts have been made to find a solution to this problem (del Campo et al 2009;Leon and Saridakis 2010;Jimenez and Maroto 2009;Berger and Shojae 2006;Griest 2002;Jamil and Rahaman 2009;Jamil et al 2010a;Jamil and Saridakis 2010;Jamil and Farooq 2010;Jamil et al 2010b). A suitable interaction between DE and DM is required if we wish to find an effective solution to this problem.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of modified Chaplygin gas in brane world scenario: phase plane analysis

Rudra

Debnath

Biswas

2012

Astrophys Space Sci

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In this work we investigate the background dynamics when dark energy is coupled to dark matter with a suitable interaction in the universe described by brane cosmology. Here DGP and the RSII brane models have been considered separately. Dark energy in the form of modified Chaplygin gas is considered. A suitable interaction between dark energy and dark matter is considered in order to at least alleviate (if not solve) the cosmic coincidence problem. The dynamical system of equations is solved numerically and a stable scaling solution is obtained. A significant attempt towards the solution of the cosmic coincidence problem is taken. The statefinder parameters are also calculated to classify the dark energy models. Graphs and phase diagrams are drawn to study the variations of these parameters. It is also seen that the background dynamics of modified Chaplygin gas is completely consistent with the notion of an accelerated expansion in the late universe. Finally, it has been shown that the universe in both the models follows the power law form of expansion around the critical point, which is consistent with the known results.

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Section: Introductionmentioning

confidence: 99%

Dynamics of modified Chaplygin gas in brane world scenario: phase plane analysis

Rudra

Debnath

Biswas

2012

Astrophys Space Sci

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“…This is known as the famous cosmic coincidence problem. till date several attempts have been made to find a solution to this problem [15,16,17,18,19,20,21,22,23,24,25]. A suitable interaction between DE and DM is the best possible tool to find an effective solution to this problem.…”

Section: Introductionmentioning

confidence: 99%

Interacting Generalized Cosmic Chaplygin Gas in Loop Quantum Cosmology: A Singularity Free Universe

Chowdhury

Rudra

2012

Int J Theor Phys

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In this work we investigate the background dynamics when dark energy is coupled to dark matter with a suitable interaction in the universe described by Loop quantum cosmology. Dark energy in the form of Generalised Cosmic Chaplygin gas is considered. A suitable interaction between dark energy and dark matter is taken into account in order to at least alleviate (if not solve) the cosmic coincidence problem. The dynamical system of equations is solved numerically and a stable scaling solution is obtained. A significant attempt towards the solution of the cosmic coincidence problem is taken. The statefinder parameters are also calculated to classify the dark energy model. Graphs and phase diagrams are drawn to study the variations of these parameters. It is seen that the background dynamics of Generalised Cosmic Chaplygin gas is completely consistent with the notion of an accelerated expansion in the late universe. From the graphs, generalised cosmic Chaplygin gas is identified as a dark fluid with a lesser negative pressure compared to Modified Chaplygin gas, thus supporting a 'No Big Rip' cosmology. It has also been shown that in this model the universe follows the power law form of expansion around the critical point, which is consistent with the known results. Future singularities that may be formed in this model as an ultimate fate of the universe has been studied in detail. It was found that the model is completely free from any types of future singularities.

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“…The present observational data favour an equation of state (EoS) for dark energy with the parameter very close to the cosmological constant, but it needs to be extremely fine-tuned to satisfy the present value of dark energy [7]. In recent years many dark energy models have been proposed, such as quintessence [8], phantom [9], tachyon [10][11][12], k-essence [13], dilatonic ghost condensate [14], and quart-essence [15].…”

Section: Introductionmentioning

confidence: 89%

Holographic dark energy model with quintessence in general class of Bianchi cosmological models

ChaubeyR.

2015

Can. J. Phys.

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In this paper, we study the general class of Bianchi cosmological models with holographic dark energy component. We have discussed three types of solutions of the average scale factor for the general class of Bianchi cosmological models by using a special law for the deceleration parameter, which is linear in time with a negative slope. The exact solutions to the corresponding field equations are also obtained. All the physical parameters are calculated and discussed in each physically viable cosmological model. For large time (i.e., t ¡ ∞) the models tend asymptotically to an isotropic Friedmann-Robertson-Walker cosmological model. Quintessence scalar field and quintessence potential are also obtained for three different scenarios of scale factor. PACS Nos.: 04.20.-q, 98.80.Jk.Résumé : Nous étudions ici la classe générale des modèles cosmologiques de Bianchi avec une composante d'énergie sombre holographique. Nous discutons trois types de solutions du facteur d'échelle moyen pour cette classe générale, en utilisant une loi spéciale pour le paramètre de décélération qui est linéaire dans le temps, avec une pente négative. Nous obtenons aussi les solutions exactes des équations de champ correspondantes. Tous les paramètres physiques sont calculés et discutés dans chaque modèle cosmologique physiquement viable. Pour des temps éloignés (t ¡ ∞), les modèles tendent asymptotiquement vers un modèle cosmologique isotrope de Friedmann-Robertson-Walker. Nous obtenons également le champ scalaire de quintessence et le potentiel de quintessence pour trois scénarios différents du facteur d'échelle.

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Phantom dark energy with varying-mass dark matter particles: Acceleration and cosmic coincidence problem

Cited by 60 publications

References 86 publications

Dynamics of modified Chaplygin gas in brane world scenario: phase plane analysis

Dynamics of modified Chaplygin gas in brane world scenario: phase plane analysis

Interacting Generalized Cosmic Chaplygin Gas in Loop Quantum Cosmology: A Singularity Free Universe

Holographic dark energy model with quintessence in general class of Bianchi cosmological models

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