Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Sengupta, Rikpratik"'
Autor:
Sengupta, Rikpratik
Publikováno v:
General Relativity and Gravitation 56(4):42 2024
We obtain a \textit{novel} model of oscillating non-singular cosmology on the spatially flat Randall-Sundrum (RS) II brane. At early times, the universe is dominated by a scalar field with an inflationary emergent potential $V(\phi)=A(e^{B\phi}-1)^2$
Externí odkaz:
http://arxiv.org/abs/2311.02053
In this paper we attempt to construct a regular gravastar model using the UV corrected framework of Loop Quantum Cosmology. We find that a stable gravastar model can be constructed with a number of unique features: (i) no thin shell approximation nee
Externí odkaz:
http://arxiv.org/abs/2311.00692
Publikováno v:
Eur. Phys. J. C (2023) 83:830
In this paper, we construct a traversable static Lorentzian wormhole in the effective scenario of Loop Quantum Cosmology (LQC), where the field equations are modified due to the ultraviolet (UV) corrections introduced at large space-time curvatures.
Externí odkaz:
http://arxiv.org/abs/2309.12527
Publikováno v:
JCAP 09 (2023) 018
In this paper we have explored the possibility of constructing a traversable wormhole on the Shtanov-Sahni braneworld with a timelike extra dimension. We find that the Weyl curvature singularity at the throat of the wormhole can be removed with physi
Externí odkaz:
http://arxiv.org/abs/2307.02605
In this paper, we attempt to explore the possibility of a obtaining a viable emergent universe scenario supported by a type of fluid known as the extended Chaplygin gas, which extends a modification to the equation of state of the well known modified
Externí odkaz:
http://arxiv.org/abs/2307.02602
Publikováno v:
Class. Quantum Grav. 40 (2023) 095009
A non-singular Emergent Universe (EU) scenario within the realm of standard Relativistic physics requires a generalization of the Equation of State (EoS) connecting the pressure and energy density. This generalized EoS is capable of describing a comp
Externí odkaz:
http://arxiv.org/abs/2303.13783
Publikováno v:
Eur.Phys.J.Plus (2023) 138:929
In this paper we take matter source with non-linear Equation of state (EoS) that has produced non-singular Emergent cosmology for spatially flat universe in General Relativity and minimally coupled scalar field with two different potentials that prod
Externí odkaz:
http://arxiv.org/abs/2302.09062
Publikováno v:
International Journal of Modern Physics D Vol. 29, No. 03, 2050027 (2020)
In Einstein's Field Equation(EFE) the geometry of the space-time is connected with the matter distribution. The geometry or the gravitational sector deals with classical macroscopic objects involving gravitational units while the matter sector can be
Externí odkaz:
http://arxiv.org/abs/2209.00450
Publikováno v:
Annals of Physics Volume 439 (2022) 168778
Wormholes with Ellis geometry have been successfully constructed using tachyon matter \cite{Das}. However, for such a wormhole, it is obtained that the redshift function is necessarily a constant, and also the wormhole is plagued with an imaginary ta
Externí odkaz:
http://arxiv.org/abs/2205.06232
Publikováno v:
Mod. Phys. Lett. A 2022.37
In recent years, a class of compact objects called gravastars have drawn immense interest as regular solutions to end state stellar collapse. Since the energy density involved in collapse process is expected to be high, it is a natural choice to stud
Externí odkaz:
http://arxiv.org/abs/2203.12027