Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Stavrinos, Panayiotis"'
Publikováno v:
Physical Review D 108, 044048 (2023)
In this work we investigate the anisotropic conformal structure of the gravitational field incorporating dark gravity in a generalized Lagrange geometric framework on the Lorentz tangent bundle and we present two applications; the anisotropic conform
Externí odkaz:
http://arxiv.org/abs/2308.13308
Publikováno v:
Universe 7 (2021) 89
We study new classes of generic off-diagonal and diagonal cosmological solutions for effective Einstein equations in modified gravity theories, MGTs, with modified dispersion relations, MDRs, encoding possible violations of (local) Lorentz invariance
Externí odkaz:
http://arxiv.org/abs/2106.00462
Publikováno v:
Universe 6 (2020) 138
The aim of this paper is to provide the geometrical structure of a gravitational field that includes the addition of dark matter in the framework of a Riemannian and a Riemann--Sasaki spacetime. By means of the classical Riemannian geometric methods
Externí odkaz:
http://arxiv.org/abs/2101.00657
Publikováno v:
Eur. Phys. J. Plus 135 (2020) 557
We investigate the dynamics of gravitational field and particles in a generalized framework of a Lorentz tangent bundle. By variating an appropriate action for each case, we obtain generalized forms of paths and generalized field equations for a Sasa
Externí odkaz:
http://arxiv.org/abs/2004.00356
Autor:
Ikeda, Satoshi, Saridakis, Emmanuel N., Stavrinos, Panayiotis C., Triantafyllopoulos, Alkiviadis
Publikováno v:
Phys. Rev. D 100, 124035 (2019)
We investigate the cosmological applications of scalar-tensor theories that arise effectively from the Lorentz fiber bundle of a Finsler-like geometry. We first show that the involved nonlinear connection induces a new scalar degree of freedom and ev
Externí odkaz:
http://arxiv.org/abs/1907.10950
Autor:
Minas, Georgios, Saridakis, Emmanuel N., Stavrinos, Panayiotis C., Triantafyllopoulos, Alkiviadis
Publikováno v:
Universe 2019, 5(3), 74
We investigate the bounce realization in the framework of generalized modified gravities arising from Finsler and Finsler-like geometries. In particular, the richer intrinsic geometrical structure is reflected in the appearance of extra degrees of fr
Externí odkaz:
http://arxiv.org/abs/1902.06558
In this work, we obtain the Raychaudhuri equations for various types of Finsler spaces as the Finsler-Randers (FR) space-time and in a more general geometrical structure of the space-time manifold which contains two fibres that are two scalars which
Externí odkaz:
http://arxiv.org/abs/1612.04554
Akademický článek
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Publikováno v:
Int. J. Mod. Phys. D 23 (2014) 1450094
We study modifications of general relativity, GR, with nonlinear dispersion relations which can be geometrized on tangent Lorentz bundles. Such modified gravity theories, MGTs, can be modeled by gravitational Lagrange density functionals $f(\mathbf{R
Externí odkaz:
http://arxiv.org/abs/1401.2879
Publikováno v:
Phys. Rev. D 88 (2013) 123510
In this article we present the cosmological equivalence between the relativistic Finsler-Randers cosmology, with dark energy and modified gravity constructions, at the background level. Starting from a small deviation from the quadraticity of the Rie
Externí odkaz:
http://arxiv.org/abs/1311.5915