Interacting viscous ghost tachyon, K-essence and dilaton scalar field models of dark energy

Karami, K.; Fahimi, K.

doi:10.1088/0264-9381/30/6/065018

Cited by 28 publications

(9 citation statements)

References 90 publications

(97 reference statements)

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“…GDE has attained significant attention and various aspects have been discussed such as interacting GDE models (Sheykhi and Movahed 2012), thermodynamics (Feng et al 2012), correspondence with scalar field models (Karami and Fahimi 2013), f (R) gravity (Jawad 2014; Saaidi et al 2012), f (T ) gravity (Karami et al 2013a) and Brans-Dicke theory (Ebrahimi and Sheykhi 2011). In (Cai et al 2012), authors presented a generalized GDE of the form αH + βH 2 and discussed its dynamical evolution.…”

Section: Introductionmentioning

confidence: 99%

Reconstructing QCD ghost f(R,T) models

Zubair

Abbas

2015

Astrophys Space Sci

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We reconstruct f (R, T ) theory (where R is the scalar curvature and T is the trace of energy-momentum tensor) in the framework of QCD ghost dark energy models. In this study, we concentrate on particular models of f (R, T ) gravity which permits the standard continuity equation in this theory. It is found that reconstructed function can represent phantom and quintessence regimes of the universe in the background of flat FRW universe. In addition, we explore the stability of ghost f (R, T ) models.

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Section: Introductionmentioning

confidence: 99%

Reconstructing QCD ghost f(R,T) models

Zubair

Abbas

2015

Astrophys Space Sci

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“…The latter system has been the case of study of various analysis in the literature [49][50][51][52][53][54][55][56][57][58][59][60] where Q = Q (ρ m , ρ d ) has been assumed to be either a linear function [46][47][48][49][61][62][63][64][65][66] and many others. Additionally, with the above choices for the coupling function, various functional forms of the scalar field potential function V (φ) can also be chosen [33,35,[50][51][52]60,[67][68][69][70][71][72].…”

Section: Interacting Dark Energymentioning

confidence: 99%

Interacting quintessence in light of generalized uncertainty principle: cosmological perturbations and dynamics

et al. 2021

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We consider a cosmological scenario endowed with an interaction between the universe’s dark components – dark matter and dark energy. Specifically, we assume the dark matter component to be a pressure-less fluid, while the dark energy component is a quintessence scalar field with Lagrangian function modified by the quadratic Generalized Uncertainty Principle. The latter modification introduces new higher-order terms of fourth-derivative due to quantum corrections in the scalar field’s equation of motion. Then, we investigate asymptotic dynamics and general behaviour of solutions of the field equations for some interacting models of special interests in the literature. At the background level, the present interacting model exhibits the matter-dominated and de Sitter solutions which are absent in the corresponding quintessence model. Furthermore, to boost the background analysis, we study cosmological linear perturbations in the Newtonian gauge where we show how perturbations are modified by quantum corrected terms from the quadratic Generalized Uncertainty Principle. Depending on the coupling parameters, scalar perturbations show a wide range of behavior.

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“…This model helps in alleviating the fine tuning as well as cosmic coincidence problem (Urban and Zhitnitsky 2009a, 2009b, 2010a, 2010b, 2011Forbes and Zhitnitsky 2008). Several theoretical aspects have been investigated for this model (Ebrahimi and Sheykhi 2011;Sheykhi and Sadegh 2012;Sheykhi and Bagheri 2011;Rozas-Fernandez 2012;Karami and Fahimi 2013) and tested thorough different observational schemes (Cai et al 2011).…”

Section: Equation Of State Parametermentioning

confidence: 99%

Analysis of generalized ghost version of pilgrim dark energy

Sharif

Jawad

2014

Astrophys Space Sci

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The proposal of pilgrim dark energy is based on the speculation that phantom-like dark energy possesses enough resistive force to preclude the black hole formation in the later universe. We explore this phenomenon by assuming the generalized ghost version of pilgrim dark energy. We find that most of the values of the interacting (ξ 2 ) as well as pilgrim dark energy (u) parameters push the equation of state parameter towards phantom region. The squared speed of sound shows that this model remains stable in most of the cases of ξ 2 and u. We also develop ω Λ − ω ′ Λ plane and observe that this model corresponds to thawing as well as freezing regions. Finally, it is shown that the non-interacting and interacting generalized ghost versions of pilgrim dark energy correspond to ΛCDM limit on the statefinder plane.

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Interacting viscous ghost tachyon, K-essence and dilaton scalar field models of dark energy

Cited by 28 publications

References 90 publications

Reconstructing QCD ghost f(R,T) models

Reconstructing QCD ghost f(R,T) models

Interacting quintessence in light of generalized uncertainty principle: cosmological perturbations and dynamics

Analysis of generalized ghost version of pilgrim dark energy

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