Results 11 to 20 of about 1,121 (263)
European Physical Journal C: Particles and Fields, 2018 We elaborate on the anholonomic frame deformation method, AFDM, for constructing exact solutions with quasiperiodic structure in modified gravity theories, MGTs, and general relativity, GR.
Laurenţiu Bubuianu, Sergiu I. Vacaru
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Isotropic Perfect Fluids in Modified Gravity
Universe, 2023 We generate the Einstein–Gauss–Bonnet field equations in higher dimensions for a spherically symmetric static spacetime. The matter distribution is a neutral fluid with isotropic pressure.
Shavani Naicker +2 more
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European Physical Journal C: Particles and Fields, 2023 This study delves into the realm of solving Einstein’s field equations within the framework of general relativity. In this paper, we present an exact solution derived through the vanishing complexity approach and offer a comparative analysis with the ...
Satyanarayana Gedela, Ravindra K. Bisht
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The Kerr-Schild double copy in Lifshitz spacetime
Journal of High Energy Physics, 2021 The Kerr-Schild double copy is a map between exact solutions of general relativity and Maxwell’s theory, where the nonlinear nature of general relativity is circumvented by considering solutions in the Kerr-Schild form.
Gökhan Alkaç +2 more
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Journal of High Energy Physics, 2020 The double copy formalism provides an intriguing connection between gauge theories and gravity. It was first demonstrated in the perturbative context of scattering amplitudes but recently the formalism has been applied to exact classical solutions in ...
Rashid Alawadhi +3 more
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An axially symmetric spacetime with causality violation in Ricci-inverse gravity
European Physical Journal C: Particles and Fields, 2023 In this paper, Ricci-inverse gravity is investigated. It is an alternative theory of gravity that introduces into the Einstein–Hilbert action an anti-curvature scalar that is obtained from the anti-curvature tensor which is the inverse of the Ricci ...
J. C. R. de Souza, A. F. Santos
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Using Algebraic Computing To Teach General Relativity And Cosmology
Annals of West University of Timisoara: Physics, 2012 The article presents some new aspects and experience on the use of computer in teaching general relativity and cosmology for undergraduate students (and not only) with some experience in computer manipulation. Some years ago certain results were reported
Vulcanov Dumitru N. +1 more
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MULTIDIMENSIONAL SOLITONS WITH SPHERICAL COMPACTIFICATION
Odessa Astronomical Publications, 2012 Multidimensional static spherically symmetric (with respect to the external 3-dimensional space) vacuum solutions of the Einstein equation were well-known and prevalent in literature for a long time. These solutions are called solitons. Among them, there
A. V. Chopovsky +2 more
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Conformal Mappings in Relativistic Astrophysics
Journal of Applied Mathematics, 2013 We describe the use of conformal mappings as a mathematical mechanism to obtain exact solutions of the Einstein field equations in general relativity. The behaviour of the spacetime geometry quantities is given under a conformal transformation, and the ...
S. Hansraj, K. S. Govinder, N. Mewalal
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European Physical Journal C: Particles and Fields, 2021 The solutions for the field equations of f(R) gravity are investigated in static cylindrically symmetric space-time. Conserved quantities of the system, as well as unknown functions, can be determined with the help of the Noether symmetry method. In this
Işıl Başaran Öz, Kazuharu Bamba
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