Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Darabi, Farhad"'
Publikováno v:
Int. J. Mod. Phys. D, Vol. 29, No. 10, 2050077 (2020)
We study $\alpha$-attractor models with both E-model and T-model potential in an extended Non-Minimal Derivative (NMD) inflation where a canonical scalar field and its derivatives are non-minimally coupled to gravity. We calculate the evolution of pe
Externí odkaz:
http://arxiv.org/abs/2101.03981
Publikováno v:
Advances in High Energy Physics, 2343896, 2018
We study nonlinear cosmological perturbations and their possible non-Gaussian character in an extended non-minimal inflation where gravity is coupled non-minimally to both the scalar field and its derivatives. By expansion of the action up to the thi
Externí odkaz:
http://arxiv.org/abs/1808.04259
Autor:
Heydarzade, Yaghoub, Rudra, Prabir, Pourhassan, Behnam, Faizal, Mir, Ali, Ahmed Farag, Darabi, Farhad
Publikováno v:
JCAP06(2018)038
In this paper, we will analyze a time dependent geometry in a massive theory of gravity. This will be done by analyzing Vaidya space-time in such a massive theory of gravity. As gravitational collapse is a time dependent system, we will analyze it us
Externí odkaz:
http://arxiv.org/abs/1801.01543
Publikováno v:
Phys. Lett. B 774 (2017) 46-53
In this paper, we will analyze the energy dependent deformation of massive gravity using the formalism of massive gravity's rainbow. So, we will use the Vainshtein mechanism and the dRGT mechanism for the energy dependent massive gravity, and thus an
Externí odkaz:
http://arxiv.org/abs/1710.00673
Publikováno v:
Mod. Phys. Lett. A, Vol. 27, No. 37 (2012) 1250214
The conditions for which the no boundary proposal may have a classical realization of a continuous change of signature, are investigated for a cosmological model described by FRW metric coupled with a self interacting scalar field, having a noncommut
Externí odkaz:
http://arxiv.org/abs/1205.1037
Autor:
Jamil, Mubasher, Darabi, Farhad
Publikováno v:
Int. J. Theor. Phys. (2012) 51:1007-1012
By using the quantum tunneling approach over semiclassical approximations, we study the quantum corrections to the Hawking temperature, entropy and Bekenstein-Hawking entropy-area relation for a black hole in an asymptotically safe gravity with highe
Externí odkaz:
http://arxiv.org/abs/1110.6532
Autor:
Jamil, Mubasher, Darabi, Farhad
Publikováno v:
Int.J.Theor.Phys.50:2460-2465,2011
By using the quantum tunneling approach over semiclassical approximations, we study the quantum corrections to the Hawking temperature, entropy and Bekenstein-Hawking entropy-area relation for a black hole lying on a brane.
Comment: 8 pages, acc
Comment: 8 pages, acc
Externí odkaz:
http://arxiv.org/abs/1102.4938
Publikováno v:
Mod.Phys.Lett.A25:3279-3289,2010
We discuss the conformal symmetry between Jordan and Einstein frames considering their relations with the metric and Palatini formalisms for modified gravity. Appropriate conformal transformations are taken into account leading to the evident connect
Externí odkaz:
http://arxiv.org/abs/1009.2580
Publikováno v:
Mod.Phys.Lett.A26:1047-1057,2011
The entropy of the charged BTZ black hole horizon is described by the Cardy-Verlinde formula. We then compute the self-gravitational corrections to the Cardy-Verlinde formula of the charged BTZ black hole in the context of Keski-Vakkuri, Kraus and Wi
Externí odkaz:
http://arxiv.org/abs/1006.3317
Publikováno v:
Mod.Phys.Lett.A26:65-72,2011
The equivalence between metric and Palatini formalisms in f(R)-gravity can be achieved in the general context of theories with divergence free current. This equivalence is a necessary result of a symmetry which is included in a particular conservatio
Externí odkaz:
http://arxiv.org/abs/1006.0454