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On finite time singularities in scalar field dark energy models based in the RS-II Braneworld
- Source :
- European Physical Journal, Eur.Phys.J.C, Eur.Phys.J.C, 2022, 82 (9), pp.800. ⟨10.1140/epjc/s10052-022-10767-2⟩
- Publication Year :
- 2022
- Publisher :
- arXiv, 2022.
-
Abstract
- The quest of deciphering the true nature of dark energy has proven to be one of the most exciting in recent times in cosmology. Various ideas have been put forward in this regard besides the usual cosmological constant approach, ranging from scalar field based models like Quintessence and Phantom dark energy to various modified gravity approaches as well. A very interesting idea then is to consider scalar field dark energy models in quantum gravitationally corrected cosmologies with the RS-II Braneworld being one of the most well known in this regard. So in this work, we consider RS-II Braneworld based scalar field dark energy models and try to look out for the existence of finite time singularities in these regimes both through a dynamical system perspective, for which we employ the Goriely-Hyde singularity analysis method, and a physical perspective. Our approach is general in the sense that it is not limited to any particular class of potentials or for any constrained parameter region for the brane tension and is valid for both Quintessence and phantom dark energy regimes. We firstly show through Goriely-Hyde procedure that finite time singularities can exist in these models for a limited set of initial conditions and that this result would hold irrespective of any consideration given to the swampland dS conjecture. We then discuss the physical nature of the singularities that can occur in this regime, where we use a well motivated ansatz for the Hubble parameter and show that these models of dark energy can allow for weak singularities like those of Type III and Type IV and can also allow for strong singularities like the Big Rip (Type I).<br />Comment: v2, 17 pages with no figures, matches the published version in EPJC
- Subjects :
- High Energy Physics - Theory
cosmological model
cosmological constant
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Physics and Astronomy (miscellaneous)
dark energy: phantom
gravitation: model
[PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th]
quintessence
FOS: Physical sciences
Astrophysics::Cosmology and Extragalactic Astrophysics
General Relativity and Quantum Cosmology (gr-qc)
singularity
General Relativity and Quantum Cosmology
boundary condition
field theory: scalar
membrane model
High Energy Physics - Theory (hep-th)
quantum gravity
Randall-Sundrum model
[PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc]
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Engineering (miscellaneous)
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- European Physical Journal, Eur.Phys.J.C, Eur.Phys.J.C, 2022, 82 (9), pp.800. ⟨10.1140/epjc/s10052-022-10767-2⟩
- Accession number :
- edsair.doi.dedup.....829e049f5942fa869aeb7da3929b16b2
- Full Text :
- https://doi.org/10.48550/arxiv.2201.01015