A Lorentz invariance violating cosmology on the DGP brane

Nozari, Kourosh; Sadatian, S. Davood

doi:10.1088/1475-7516/2009/01/005

Cited by 13 publications

(17 citation statements)

References 65 publications

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“…On the other hand, non-minimal coupling of the scalar field and induced gravity provides a new degree of freedom which requires special fine tuning and this may provide a suitable basis to treat ghost instability. Lorentz invariance violating scenarios are other alternative paradigm which may shed light in this problem due to their wider parameter spaces [33]. As we have shown here, non-minimal coupling of the scalar field and induced gravity has the capability to account for bouncing solutions.…”

Section: Ads Bulk With Brane Tensionmentioning

confidence: 83%

A Braneworld Dark Energy Model with Induced Gravity and the Gauss-Bonnet Effect

Nozari

Rashidi

2009

Int J Theor Phys

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We construct a holographic dark energy model with a non-minimally coupled scalar field on the brane where Gauss-Bonnet and Induced Gravity effects are taken into account. This model provides a wide parameter space with several interesting cosmological implications. Especially, the equation of state parameter of the model crosses the phantom divide line and it is possible to realize bouncing solutions in this setup. PACS: 04.50.-h, 98.80.-k, 95.36.+x

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Section: Ads Bulk With Brane Tensionmentioning

confidence: 83%

A Braneworld Dark Energy Model with Induced Gravity and the Gauss-Bonnet Effect

Nozari

Rashidi

2009

Int J Theor Phys

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“…As we shown in [11], for study Lorentz violation, we assume a vector u µ in the extra dimension. So, this local frame at space-time is unavoidably selected as the preferred frame.…”

Section: A Lorentz Violating Dgp Brane Modelmentioning

confidence: 99%

“…In this regard, DGP model also predicts deviations from the standard 4-dimensional gravity in over large distances. However, impact of Lorentz invariance violating models (LIV) on cosmology has been studied in [9,10,11]. This models has been used in the context of scalar-vector-tensor theories [9,11].…”

Section: Introductionmentioning

confidence: 99%

“…However, impact of Lorentz invariance violating models (LIV) on cosmology has been studied in [9,10,11]. This models has been used in the context of scalar-vector-tensor theories [9,11]. One important observation has been made in reference [11,12] which considered accelerated expansion and crossing of phantom divide line with one minimally coupled scalar field in the attendance of a Lorentz invariance violating vector field.…”

Section: Introductionmentioning

confidence: 99%

“…This models has been used in the context of scalar-vector-tensor theories [9,11]. One important observation has been made in reference [11,12] which considered accelerated expansion and crossing of phantom divide line with one minimally coupled scalar field in the attendance of a Lorentz invariance violating vector field. As one has shown in [13], quintessence model with a single minimally coupled scalar field has not the capability to describe crossing of phantom divide line, ω = −1.…”

Section: Introductionmentioning

confidence: 99%

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Cosmological Aspects of a Vector Field Model

Sadatian

2012

Int. J. Mod. Phys. D

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We have studied a DGP-inspired braneworld scenario where the idea of Lorentz invariance violation has been combined into a specifying preferred frame that embed a dynamical normal vector field to brane. We propose the Lorentz violating DGP brane models with enough parameters can explain crossing of phantom divide line. Also we have considered the model for proper cosmological evolution that is according to the observed behavior of the equation of state. In other view point, we have described a Rip singularity solution of model that occur in this model. : 04.50.+h, 98.80.-k PACS

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Modified gravitational equations on braneworld with Lorentz invariant violation

2009

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The modified gravitational equations to describe a four-dimensional braneworld in the case with the Lorentz invariant violation in a bulk spacetime is presented. It contains a trace part of the brane energy-momentum tensor and the coefficients of all terms describe the Lorentz violation effects from the bulk spacetime. As an application, we apply this formalism to study cosmology. In respect to standard effective Friedmann equations on the brane, Lorentz invariance violation in the bulk causes a modification of this equations that can lead to significant physical consequences. In particular, the effective Friedmann equation on the brane explicitly depends on the equation of state of the brane matter and the Lorentz violating parameters. We show that the components of five-dimensional Weyl curvature are related to the matter on brane even at low energies. We also find that the constraints on the theory parameters are depend on the equation of state of the energy components of 123 910 Arianto et al. the brane matter. Finally, the stability of the model depend on the specific choices of initial conditions and the parameters β i .

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A Lorentz invariance violating cosmology on the DGP brane

Cited by 13 publications

References 65 publications

A Braneworld Dark Energy Model with Induced Gravity and the Gauss-Bonnet Effect

A Braneworld Dark Energy Model with Induced Gravity and the Gauss-Bonnet Effect

Cosmological Aspects of a Vector Field Model

Modified gravitational equations on braneworld with Lorentz invariant violation

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