Stability of a tachyon braneworld

Germán, Gabriel; Herrera–Aguilar, Alfredo; Kuerten, André Martorano; Malagón–Morejón, Dagoberto; Rocha, Roldão da

doi:10.1088/1475-7516/2016/01/047

Cited by 12 publications

(21 citation statements)

References 101 publications

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“…17, and is positive in any case. The tachyon braneworld in the bulk AdS space is stable under scalar fluctuations, which is consistent with that in [14,16]. When Λ 5 = 0, H and σ of 1−A are replaced by 6H and −k 2 5 Λ 5 respectively, which reduces to 1 − A in the above bulk AdS case.…”

Section: )supporting

confidence: 88%

“…denote the spacetime indices of the braneworlds. The generalized definition of the 4D mass space-times with constant curvature is defined as [16,[29][30][31]…”

Section: Instability Of Tachyonic Braneworldmentioning

confidence: 99%

“…Once the Schrodinger-like equation can be written in terms of the supersymmetric operators Π † and Π, there are no states with usable modes, which is borrowed from supersymmetric quantum mechanics [16,[29][30][31]. Employing the auxiliary field X , the superpotential J may be defined as…”

Section: )mentioning

confidence: 99%

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Configurational entropy and instability of tachyonic braneworld

Lee

2020

Physics Letters B

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We consider tachyonic braneworld with a bulk cosmological constant and investigate a configurational entropy of various magnitudes of scale factor. It is found that for a bulk negative/zero cosmological constant, the configurational entropy has a global minimum when the magnitude of scale factor reaches the critical value. This result seems to have intriguing implications such that an accelerated rate of the universe and cosmological inflation rate for radiation/matter domination are able to be determined by such critical value. We also find that the configurational entropy almost monotonically decreases for a bulk positive cosmological constant as the magnitude of scale factor grows up. We find an exact solution of tachyonic braneworld in a bulk de Sitter space. It is shown that such system under scalar perturbations is stable for some constraint relation. Furthermore, we also find that tachyonic braneworld model with a bulk negative/zero cosmological constant is always stable under scalar perturbations.

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Section: )supporting

confidence: 88%

“…denote the spacetime indices of the braneworlds. The generalized definition of the 4D mass space-times with constant curvature is defined as [16,[29][30][31]…”

Section: Instability Of Tachyonic Braneworldmentioning

confidence: 99%

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Configurational entropy and instability of tachyonic braneworld

Lee

2020

Physics Letters B

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“…However, for each of the four cases mentioned above, equation (4.13) becomes relatively simple with solutions 14) where, in the last line…”

Section: (46)mentioning

confidence: 99%

“…In particular, the stability under tensor perturbations and gravity localization has been demonstrated. In a subsequent paper [14] the stability under scalar perturbation has been studied for a braneworld with maximally symmetric geometry. Models where matter in the bulk contains a non-minimally coupled selfinteracting scalar have also been studied.…”

Section: Introductionmentioning

confidence: 99%

Tachyon with an inverse power-law potential in a braneworld cosmology

Bilić

Domazet

Djordjević

2017

Class. Quantum Grav.

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We study a tachyon cosmological model based on the dynamics of a 3-brane in the bulk of the second Randall-Sundrum model extended to more general warp functions. A well known prototype of such a generalization is the bulk with a selfinteracting scalar field. As a consequence of a generalized bulk geometry the cosmology on the observer brane is modified by the scale dependent four-dimensional gravitational constant. In particular we study a power law warp factor which generates an inverse power-law potential V ∝ ϕ −n of the tachyon field ϕ. We find a critical power n cr that divides two subclasses with distinct asymptotic behaviors: a dust universe for n > n cr and a quasi de Sitter universe for 0 < n < n cr .

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Dynamical tachyonic AdS/QCD and information entropy

et al. 2018

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The configurational entropy setup is employed to study dynamical tachyonic holographic AdS/QCD models. The phenomenology of light-flavour mesonic states is then corroborated by the Shannon's information. Tachyonic bulk corrections to the dynamical AdS/QCD show more dominant and abundant dual mesonic states in the 4D boundary QCD, when compared to the dual mesons in the standard dynamical AdS/QCD. Entropic Regge-like trajectories are also emulated. *

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Stability of a tachyon braneworld

Abstract: Within the braneworld paradigm the tachyonic scalar field has been used to gener-ArXiv ePrint: 1508.03867

Cited by 12 publications

References 101 publications

Configurational entropy and instability of tachyonic braneworld

Configurational entropy and instability of tachyonic braneworld

Tachyon with an inverse power-law potential in a braneworld cosmology

Dynamical tachyonic AdS/QCD and information entropy

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