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Generalized teleparallel de Sitter geometries [PDF]
European Physical Journal C: Particles and Fields, 2023 Theories of gravity based on teleparallel geometries are characterized by the torsion, which is a function of the coframe, derivatives of the coframe, and a zero curvature and metric compatible spin-connection.
A. A. Coley +3 more
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Black holes and non-perturbative gravitational waves in f(R) gravity
European Physical Journal C: Particles and Fields, 2023 Exact solutions of spherically symmetric black hole and gravitational wave are explored in f(R) gravity in arbitrary dimension. We find two exact solutions for the radiation and absorption of null dust.
Chunmei Liu, Hongsheng Zhang
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Note on the asymptotic structure of Kerr-Schild form
Journal of High Energy Physics, 2022 The Kerr-Schild form provides a natural way of realizing the classical double copy that relates exact solutions in general relativity to exact solutions in gauge theory. In this paper, we examine the asymptotic structure of Kerr-Schild form.
Pujian Mao, Weicheng Zhao
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Collapsing dynamics of relativistic fluid in modified gravity admitting a conformal Killing vector
European Physical Journal C: Particles and Fields, 2023 The collapsing dynamics of relativistic fluid are explored in f(R) gravity in detailed systematic manner for the non-static spherically symmetric spacetime satisfying the equation of the conformal Killing vector.
Kazuharu Bamba +4 more
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Charged black hole and radiating solutions in entangled relativity
European Physical Journal C: Particles and Fields, 2021 In this manuscript, we show that the external Schwarzschild metric can be a good approximation of exact black hole solutions of entangled relativity.
Olivier Minazzoli, Edison Santos
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New Riccati equations for radiating matter
European Physical Journal C: Particles and Fields, 2022 The relationship between radiating stars in general relativity and Riccati equations is investigated for a general matter distribution including the electromagnetic field and the cosmological constant.
Noeleen Naidoo +2 more
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Non-local curvature gravity cosmology via Noether symmetries
Physics Letters B, 2022 We consider extensions of General Relativity based on the non-local function f(R,□−1R), where R is the Ricci curvature scalar and the non-locality is due to the term □−1R.
Adriano Acunzo +2 more
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Quadratic Theory of Gravity with a Scalar Field and Type I Shapovalov Wave Spacetimes
Universe, 2022 For the quadratic theory of gravity with a scalar field, exact solutions are found for gravitational-wave models in Shapovalov I-type spacetimes, which do not arise in models of the general theory of relativity.
Konstantin Osetrin +2 more
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Double copy of spontaneously broken Abelian gauge theory
Physics Letters B, 2022 Similarity in the structure of scattering amplitudes in Yang-Mills theories and General Relativity led to the idea that graviton could be described as the double copy of a vector gauge field.
Euro Spallucci, Anais Smailagic
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Gödel metrics with chronology protection in Horndeski gravities
Physics Letters B, 2018 Gödel universe, one of the most interesting exact solutions predicted by General Relativity, describes a homogeneous rotating universe containing naked closed time-like curves (CTCs).
Wei-Jian Geng +3 more
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