Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Khyllep, Wompherdeiki"'
Publikováno v:
The European Physical Journal C, 84, 773 (2024)
In this paper, we present a cosmological model within the framework of symmetric teleparallel gravity, focusing on $f(Q)$ gravity, where $Q$ represents the non-metricity scalar. Utilizing cosmological datasets, we derive an accelerating cosmological
Externí odkaz:
http://arxiv.org/abs/2303.01985
Publikováno v:
Eur. Phys. J. C (2024) 84:56
We carry out a compact phase space analysis of a non-canonical scalar field theory whose Lagrangian is of the form $F(X)-V(\phi)$ within general relativity. In particular, we focus on a kinetic term of the form $F(X)=\beta X^m$ with power law potenti
Externí odkaz:
http://arxiv.org/abs/2212.10272
Motivated by the fact that cosmological models based on $f(Q)$ gravity are very efficient in fitting observational datasets at both background and perturbation levels, we perform a combined dynamical system analysis of both background and perturbatio
Externí odkaz:
http://arxiv.org/abs/2207.02610
Publikováno v:
Phys. Rev. D 105, 043511 (2022)
We apply the formalism of dynamical system analysis to investigate the evolution of interacting dark energy scenarios at the background and perturbation levels in a unified way. Since the resulting dynamical system contains the extra perturbation var
Externí odkaz:
http://arxiv.org/abs/2111.01268
Publikováno v:
Paliathanasis, A., Leon, G., Khyllep, W., Dutta, J., Pan, S. Interacting quintessence in light of generalized uncertainty principle: cosmological perturbations and dynamics. Eur. Phys. J. C 81, 607 (2021)
We consider a cosmological scenario endowed with an interaction between the universe's dark components $-$ dark matter and dark energy. Specifically, we assume the dark matter component to be a pressure-less fluid, while the dark energy component is
Externí odkaz:
http://arxiv.org/abs/2104.06097
Publikováno v:
Phys. Rev. D 103, 103521 (2021)
The present work studies one of Einstein's alternative formulations based on the non-metricity scalar $Q$ generalized as $f(Q)$ theory. More specifically, we consider the power-law form of $f(Q)$ gravity i.e. $f(Q)=Q+\alpha\, Q^n$. Here, we analyze t
Externí odkaz:
http://arxiv.org/abs/2103.08372
Autor:
Khyllep, Wompherdeiki, Dutta, Jibitesh
Publikováno v:
Eur. Phys. J. C 81, 774 (2021)
Non-minimally coupled scalar field models are well-known for providing interesting cosmological features. These include a late time dark energy behavior, a phantom dark energy evolution without singularity, an early time inflationary universe, scalin
Externí odkaz:
http://arxiv.org/abs/2102.04744
The methods of dynamical systems have found wide applications in cosmology, with focus either upon inflation or upon the passage into dark energy era. In this paper, we endeavor to capture the whole history of the universe into a dynamical system by
Externí odkaz:
http://arxiv.org/abs/2007.06601
In the present work, we compare the thermodynamical viability of two types of non-canonical scalar field models with kinetic corrections: the square kinetic and square root kinetic corrections. In modern cosmology, the generalised second law of therm
Externí odkaz:
http://arxiv.org/abs/1908.04102
Autor:
Khyllep, Wompherdeiki, Dutta, Jibitesh
Rastall gravity theory shows notable features consistent with physical observations in comparison to the standard Einstein theory. Recently, there has been a debate about the equivalence of Rastall gravity and general relativity. Motivated by this op
Externí odkaz:
http://arxiv.org/abs/1907.09221