Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Valcarcel, Jorge Gigante"'
We present the algebraic classification of the gravitational field in four-dimensional general metric-affine geometries, thus extending the current results of the literature in the particular framework of Weyl-Cartan geometry by the presence of the t
Externí odkaz:
http://arxiv.org/abs/2409.07153
Publikováno v:
Phys. Rev. D 109 (2024) 10, 104075
We analyse the stability of the vector and axial sectors of Poincar\'e gauge theory around general backgrounds in the presence of cubic order invariants defined from the curvature and torsion tensors, showing how the latter can in fact cancel out wel
Externí odkaz:
http://arxiv.org/abs/2402.08937
Publikováno v:
Phys.Rev.D 110 (2024) 2, 024017
We formulate cosmological perturbation theory around the spatially curved FLRW background in the context of metric-affine gauge theory of gravity which includes torsion and nonmetricity. Performing scalar-vector-tensor decomposition of the spatial pe
Externí odkaz:
http://arxiv.org/abs/2310.16007
Publikováno v:
Phys.Rev.D 108 (2023) 4, 044037
We present a complete algebraic classification for the curvature tensor in Weyl-Cartan geometry, by applying methods of eigenvalues and principal null directions on its irreducible decomposition under the group of global Lorentz transformations, thus
Externí odkaz:
http://arxiv.org/abs/2305.05501
Publikováno v:
JCAP02(2023)018
In the framework of Metric-Affine Gravity, the existing correspondence between the Einstein tensor and the energy-momentum tensor of matter provided by General Relativity is extended towards a post-Riemannian description in terms of the torsion and n
Externí odkaz:
http://arxiv.org/abs/2210.05998
Publikováno v:
JCAP08(2022)082
Symmetric teleparallel gravity is constructed with a nonzero nonmetricity tensor while both torsion and curvature are vanishing. In this framework, we find exact scalarised spherically symmetric static solutions in scalar-tensor theories built with a
Externí odkaz:
http://arxiv.org/abs/2206.02725
Publikováno v:
JCAP04(2022)011
We construct Pleba\'nski-Demia\'nski stationary and axisymmetric solutions with two expanding and double principal null directions in the framework of Metric-Affine gauge theory of gravity. Starting from the new improved form of the metric with vanis
Externí odkaz:
http://arxiv.org/abs/2201.10532
We present new rotating vacuum configurations endowed with both dynamical torsion and nonmetricity fields in the framework of Metric-Affine gauge theory of gravity. For this task, we consider scalar-flat Weyl-Cartan geometries and obtain an axisymmet
Externí odkaz:
http://arxiv.org/abs/2108.12414
Publikováno v:
Eur. Phys. J. C (2021) 81:495
We derive the main classical gravitational tests for a recently found vacuum solution with spin and dilation charges in the framework of Metric-Affine gauge theory of gravity. Using the results of the perihelion precession of the star S2 by the GRAVI
Externí odkaz:
http://arxiv.org/abs/2103.12036
Publikováno v:
Phys. Rev. D 103, 044058 (2021)
Axially symmetric spacetimes play an important role in the relativistic description of rotating astrophysical objects like black holes, stars, etc. In gravitational theories that venture beyond the usual Riemannian geometry by allowing independent co
Externí odkaz:
http://arxiv.org/abs/2012.09193