Holographic dilatonic dark energy model

Rozas-Fernández, Alberto

doi:10.1140/epjc/s10052-010-1536-7

Cited by 10 publications

(6 citation statements)

References 98 publications

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“…HDE is usually considered to be a very different model of DE compared to scalar field models. However, it is interesting to note that with non-trivial potentials, one can use scalar field to reconstruct HDE [365,366,367,368,369,370,371,372,373,374,375,376,377].…”

Section: Reconstructing Scalar Field Dementioning

confidence: 99%

Holographic dark energy

2017

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We review the paradigm of holographic dark energy (HDE), which arises from a theoretical attempt of applying the holographic principle (HP) to the dark energy (DE) problem. Making use of the HP and the dimensional analysis, we derive the general formula of the energy density of HDE. Then, we describe the properties of HDE model, in which the future event horizon is chosen as the characteristic length scale. We also introduce the theoretical explorations and the observational constraints for this model. Next, in the framework of HDE, we discuss various topics, such as spatial curvature, neutrino, instability of perturbation, time-varying gravitational constant, inflation, black hole and big rip singularity. In addition, from both the theoretical and the observational aspects, we introduce the interacting holographic dark energy scenario, where the interaction between dark matter and HDE is taken into account. Furthermore, we discuss the HDE scenario in various modified gravity (MG) theories, such as Brans-Dicke theory, braneworld theory, scalar-tensor theory, Horava-Lifshitz theory, and so on. Besides, we introduce the attempts of reconstructing various scalar-field DE and MG models from HDE. Moreover, we introduce other DE models inspired by the HP, in which different characteristic length scales are chosen. Finally, we make comparisons among various HP-inspired DE models, by using cosmological observations and diagnostic tools.

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Section: Reconstructing Scalar Field Dementioning

confidence: 99%

Holographic dark energy

2017

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“…Then, the second equation (36) yields the background value of the spin connection. The only non-zero components turn out to be…”

Section: B Stability Analysismentioning

confidence: 99%

“…It should be noted that it is only the background geometry g Similar attempts to derive a dark energy model out of the given scale factor already exist in literature. Take, for example, references [27][28][29][30][31][32][33][34][35][36]. There, scalar field dark energy models have been constructed to mimic holographic dark energy.…”

Section: Geometric Sigma Modelsmentioning

confidence: 99%

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Geometric sigma model of the Universe

Vasilić¹

2017

Chinese Phys. C

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The purpose of this work is to demonstrate how an arbitrarily chosen background of the Universe can be made a solution of a simple geometric sigma model. Geometric sigma models are purely geometric theories in which spacetime coordinates are seen as scalar fields coupled to gravity.Although they look like ordinary sigma models, they have the peculiarity that their complete matter content can be gauged away. The remaining geometric theory possesses a background * Electronic address: mvasilic@ipb.ac.rs

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“…However, for K-essence model, it increases but achieves a maximum value lower than that of non-interacting case as shown in Figure 10. It was argued [21,43,44] that the scalar field models favor the DE phenomenon for EoS parameter lying in the interval (−1, 0). However, in our case, the EoS of NHDE remains in this region and shows consistency.…”

Section: Discussionmentioning

confidence: 99%

Cosmological evolution of interacting new holographic dark energy in non-flat universe

Sharif

Jawad

2012

Eur. Phys. J. C

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We consider the interacting holographic dark energy with new infrared cutoff (involving Hubble parameter and its derivative) in nonflat universe. In this context, we obtain the equation of state parameter which evolutes the universe from vacuum dark energy region towards quintessence region for particular values of constant parameters. It is found that this model always remains unstable against small perturbations. Further, we establish the correspondence of this model having quintessential behavior with quintessence, tachyon, K-essence and dilaton scalar field models. The dynamics of scalar fields and potentials indicate accelerated expansion of the universe which is consistent with the current observations. Finally, we discuss the validity of the generalized second law of thermodynamics in this scenario.

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Holographic dilatonic dark energy model

Cited by 10 publications

References 98 publications

Holographic dark energy

Holographic dark energy

Geometric sigma model of the Universe

Cosmological evolution of interacting new holographic dark energy in non-flat universe

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