Interacting agegraphic dark energy model in tachyon cosmology coupled to matter

Farajollahi, H.; Ravanpak, A.; Fadakar, G. F.

doi:10.1016/j.physletb.2012.04.001

Cited by 16 publications

(18 citation statements)

References 40 publications

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“…Otherwise, in this paper we prove that the works [2][3][4][5]11] that use L m = P , or any of the specific linear combination of −ρ and P for the Lagrangian, are incompatible with the matter current conservation. Also, let us remark that it seems very unlikely that in the most general case -where the matter current conservation constraint is relaxed -the Lagrangian would reduce precisely to either L m = P or any of the specific linear combination of −ρ and P that is used in many works.…”

Section: Conclusion and Final Remarksmentioning

confidence: 75%

“…Also, let us remark that it seems very unlikely that in the most general case -where the matter current conservation constraint is relaxed -the Lagrangian would reduce precisely to either L m = P or any of the specific linear combination of −ρ and P that is used in many works. Therefore, we finally argue that one should be very cautious before considering any of the results of the works that used the results of Brown [6] in alternative theories of gravity without questioning the validity of its extrapolation to this type of models, as, for instance, in [2][3][4][5]11].…”

Section: Conclusion and Final Remarksmentioning

confidence: 94%

“…Even more than that, the simple fact that the laws of Physics depend on the considered Lagrangian should be viewed as a proof of the non-applicability of Brown's results in theories where the degeneracy of the matter Lagrangian leads to a variety of different field equations. Therefore, all works [2][3][4][5]11] considering that one can write L m = P for their on-shell perfect fluid Lagrangian -or any linear combination of −ρ and P -may be incorrect as long as they deal with theories where the matter Lagrangian enters directly in the field equations (unless one can prove the opposite in some specific situation).…”

Section: Introductionmentioning

confidence: 99%

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New derivation of the Lagrangian of a perfect fluid with a barotropic equation of state

2012

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In this paper we give a simple proof that when the particle number is conserved, the Lagrangian of a barotropic perfect fluid is Lm = −ρ c 2 + P (ρ)/ρ 2 dρ , where ρ is the rest mass density and P (ρ) is the pressure. To prove this result nor additional fields neither Lagrange multipliers are needed. Besides, the result is applicable to a wide range of theories of gravitation. The only assumptions used in the derivation are: 1) the matter part of the Lagrangian does not depend on the derivatives of the metric, and 2) the particle number of the fluid is conserved (∇σ(ρu σ ) = 0).

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Section: Conclusion and Final Remarksmentioning

confidence: 75%

Section: Conclusion and Final Remarksmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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New derivation of the Lagrangian of a perfect fluid with a barotropic equation of state

2012

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“…Tachyon scalar field motivated from string theory is a especial scalar field which can explain the whole history of the Universe from inflation to late time acceleration [50][51][52][53][54][55][56][57][58][59]. The tachyon field reconstruction of HDE and ADE models has been studied separately in some works [60][61][62][63][64].…”

Section: Issn: 2641-886xmentioning

confidence: 99%

Interacting Logarithmic Entropy-Corrected Agegraphic Chameleon-Tachyon Dark Energy

Ravanpak¹,

Fadakar²

2019

Int J Cosmol Astron Astrophys

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Considering entropy correction terms resulting from loop quantum gravity, we investigate an interacting agegraphic dark energy model. The connection between such a model and a tachyon scalar field which couples to matter in Lagrangian is studied. We reconstruct the related potential of tachyon field and find its dynamics in the Universe. Also, we discuss the implications of this entropy-corrected agegraphic dark energy model.

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“…Also, before the nucleus decay neutrino was not a belongings as a part of that nucleus, already it is appeared at the moment of the nucleus decay, as a consequence of a process of the interaction with dark energy and dark matter as in [40][41][42][43].…”

Section: Commentmentioning

confidence: 99%

Neutrino Oscillations Founded on Tachyon Theory of Neutrino

Todorović¹

2014

IJASS

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De Broglie's neutrino relations have been derived in this paper in the spirit of tachyon neutrino theory. The analysis of the physical characteristics of the neutrino as the tachyon particle has been done and a formula derived for the oscillation length. By analyzing phase angle of the plane wave, we came to the conclusion that the oscillations of neutrinos could be performed by speeds greater than the speed of light. Starting off from the application of Heisenberg's uncertainty relation in the micro-world , the postulate of neutrino confinement was introduced in the macroscopic area defined by the neutrino oscillation length. It is shown that the neutrino mass which belongs to the tachyon four-dimension space-time and the neutrino mass of the four-dimension space-time of the theory of relativity are not mutually equal by value, but the corresponding energy and momentum are unchanging.

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Interacting agegraphic dark energy model in tachyon cosmology coupled to matter

Cited by 16 publications

References 40 publications

New derivation of the Lagrangian of a perfect fluid with a barotropic equation of state

New derivation of the Lagrangian of a perfect fluid with a barotropic equation of state

Interacting Logarithmic Entropy-Corrected Agegraphic Chameleon-Tachyon Dark Energy

Neutrino Oscillations Founded on Tachyon Theory of Neutrino

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