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Weyl-invariant extensions of three-dimensional New Massive Gravity, generic n-dimensional Quadratic Curvature Gravity theories and three-dimensional Born-Infeld gravity theory are analyzed in details. As required by Weyl-invariance, the…

High Energy Physics - Theory · Physics 2014-10-01 Suat Dengiz

We derive a set of coupled equations for the gravitational and electromagnetic perturbation in the Reissner-Nordstr\"om geometry using the Newman Penrose formalism. We show that the information of the physical gravitational signal is…

General Relativity and Quantum Cosmology · Physics 2021-04-26 Claudia Moreno , Juan Carlos Degollado , Darío Núñez , Carlos Rodriguez-Leal

Transverse Diffeomorphism (TDiff) theories are well-motivated theories of gravity from the quantum perspective, which are based upon a gauge symmetry principle. The main contribution of this work is to firmly establish a correspondence…

High Energy Physics - Theory · Physics 2012-05-23 J. J. Lopez-Villarejo

In this paper, we present a second realization of the Weyl double copy (WDC) in four-dimensional algebraic type D spacetime. We show that any type D vacuum solution admits an algebraically general Maxwell scalar on the curved background…

High Energy Physics - Theory · Physics 2025-03-05 Weicheng Zhao , Pu-Jian Mao , Jun-Bao Wu

We discuss locally Weyl (scale) covariant generalisations of gravitational theories using Riemann-Cartan-Weyl space-times in arbitrary dimensions. We demonstrate the procedure of Weyl gauging on two examples in particular: General…

General Relativity and Quantum Cosmology · Physics 2019-04-18 Tekin Dereli , Cem Yetişmişoğlu

We describe the general structure of the spherically symmetric solutions in the Weyl conformal gravity. The corresponding Bach equations are derived for the special type of metrics, which can be considered as the representative of the…

General Relativity and Quantum Cosmology · Physics 2016-04-21 V. A. Berezin , V. I. Dokuchaev , Yu. N. Eroshenko

We study static cylindrically symmetric vacuum solutions in Weyl coordinates in the context of the metric f(R) theories of gravity. The set of the modified Einstein equations is reduced to a single equation and it is shown how one can…

General Relativity and Quantum Cosmology · Physics 2008-12-18 A. Azadi , D. Momeni , M. Nouri-Zonoz

The Reissner-Nordstr\"om black hole solution in a generic cosmological constant background in the the context of Rastall gravity is obtained. It is shown that the cosmological constant arises naturally from the consistency of the non-vacuum…

General Relativity and Quantum Cosmology · Physics 2017-12-05 Y. Heydarzade , H. Moradpour , F. Darabi

Shape dynamics is a classical theory of gravity which agrees with general relativity in many important cases, but possesses different gauge symmetries and constraints. Rather than spacetime diffeomorphism invariance, shape dynamics takes…

General Relativity and Quantum Cosmology · Physics 2017-09-27 Gabriel Herczeg

We construct black hole solutions in four-dimensional quadratic gravity, supported by a scalar field conformally coupled to quadratic terms in the curvature. The conformal matter Lagrangian is constructed with powers of traces of a…

High Energy Physics - Theory · Physics 2020-05-20 Nicolas Caceres , Jose Figueroa , Julio Oliva , Marcelo Oyarzo , Ricardo Stuardo

We consider scalar-tensor theories of gravity defined in Weyl integrable space-time and show that in the ADM formalism Weyl transformations corresponding to change of frames induce canonical transformations between different representations…

General Relativity and Quantum Cosmology · Physics 2018-02-14 A. B. Barreto , M. L. Pucheu , C. Romero

We study rotating black holes in five dimensions using the nAdS$_2$/nCFT$_1$ correspondence. A consistent truncation of pure Einstein gravity (with a cosmological constant) in five dimensions to two dimensions gives a generalization of the…

High Energy Physics - Theory · Physics 2019-05-31 Alejandra Castro , Finn Larsen , Ioannis Papadimitriou

We develop the properties of Weyl geometry, beginning with a review of the conformal properties of Riemannian spacetimes. Decomposition of the Riemann curvature into trace and traceless parts allows an easy proof that the Weyl curvature…

General Relativity and Quantum Cosmology · Physics 2018-06-19 James T. Wheeler

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…

General Relativity and Quantum Cosmology · Physics 2023-08-24 Sebastian Bahamonde , Jorge Gigante Valcarcel

A unitary gravitational action up to third order of curvature in which respects to the holographic $a-$theorem has been constructed in \cite{myers}. In particular, its third order term is just the Weyl-cubed term in four dimensions. In this…

High Energy Physics - Theory · Physics 2016-01-13 Mohammad A. Ganjali

Causal structure, inertial path structure and compatibility with quantum mechanics demand no full Lorentz metric, but only an integrable Weyl geometry for space time (Ehlers/Pirani/Schild 1972, Audretsch e.a. 1984). A proposal of (Tann…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Erhard Scholz

We consider a general class of four-dimensional geometries admitting a null vector field that has no twist and no shear but has an arbitrary expansion. We explicitly present the Petrov classification of such Robinson-Trautman (and Kundt)…

General Relativity and Quantum Cosmology · Physics 2017-05-08 Jiri Podolsky , Robert Svarc

We present a detailed study of the static spherically symmetric solutions in de Rham-Gabadadze-Tolley (dRGT) theory. Since the diffeomorphism invariance can be restored by introducing the St\"{u}ckelberg fields $\phi^a$, there is new…

General Relativity and Quantum Cosmology · Physics 2016-04-13 Ping Li , Xin-zhou Li , Ping Xi

We search for a real bosonic and fermionic action in four dimensions which both remain invariant under local Weyl transformations in the presence of non-metricity and contortion tensor. In the presence of the non-metricity tensor the…

General Relativity and Quantum Cosmology · Physics 2015-06-25 Agapitos Hatzinikitas

The field equations of a special class of tetrad theory of gravitation have been applied to tetrad space having three unknown functions of radial coordinate. The spherically symmetric vacuum stress-energy momentum tensor with one assumption…

General Relativity and Quantum Cosmology · Physics 2010-11-11 Gamal G. L. Nashed