Zobrazeno 1 - 10
of 92
pro vyhledávání: '"Pompeia, P. J."'
This work investigates dark matter (DM) effects in compact objects in modified teleparallel gravity (MTG) in which a modification of Teleparallel Equivalent to General Relativity is used. We applied a tetrad to the modified field equations where a se
Externí odkaz:
http://arxiv.org/abs/2304.07364
Publikováno v:
JCAP04(2023)044
We investigate compact objects in modified teleparallel gravity with realistic equations of state. We propose a modification of Teleparallel Equivalent to General Relativity, then an appropriate tetrad is applied to the field equations. A specific se
Externí odkaz:
http://arxiv.org/abs/2301.06432
Publikováno v:
Class. Quantum Grav. 39 (2022) 075007
We study the non-inertial effects of a rotating frame on a spin-zero, Duffin-Kemmer-Petiau (DKP)-like oscillator in a cosmic string space-time with non-commutative geometry in the momentum space. The spin-zero DKP-like oscillator is obtained from the
Externí odkaz:
http://arxiv.org/abs/2204.03049
Publikováno v:
Class. Quantum Grav. 39 (2022) 075006
We analyse the Klein-Gordon oscillator in a cosmic string space-time and study the effects stemming from the rotating frame and non-commutativity in momentum space. We show that the latter mimics a constant magnetic field, imparting physical interpre
Externí odkaz:
http://arxiv.org/abs/2204.03048
Publikováno v:
Symmetry 15, 709 (2023)
A scalar-tensor theory of gravity is considered wherein the gravitational coupling $G$ and the speed of light $c$ are admitted as space-time functions and combine to form the definition of the scalar field $\phi$. The varying $c$ participates in the
Externí odkaz:
http://arxiv.org/abs/2204.00119
Publikováno v:
General Relativity and Gravitation (2019) 51:107
We examine the non-inertial effects of a rotating frame on a Dirac oscillator in a cosmic string space-time with non-commutative geometry in phase space. We observe that the approximate bound-state solutions are related to the biconfluent Heun polyno
Externí odkaz:
http://arxiv.org/abs/1909.00904
Akademický článek
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Akademický článek
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Publikováno v:
JCAP 02 (2019) 055
An extension of the Starobinsky model is proposed. Besides the usual Starobinsky Lagrangian, a term proportional to the derivative of the scalar curvature, $\nabla_{\mu}R\nabla^{\mu}R$, is considered. The analyzis is done in the Einstein frame with t
Externí odkaz:
http://arxiv.org/abs/1810.08911
Publikováno v:
Phys. Rev. D 99, 084053 (2019)
In Cuzinatto et al. [Phys. Rev. D 93, 124034 (2016)], it has been demonstrated that theories of gravity in which the Lagrangian includes terms depending on the scalar curvature $R$ and its derivatives up to order $n$, i.e. $f\left(R,\nabla_{\mu}R,\na
Externí odkaz:
http://arxiv.org/abs/1806.08850