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Hace 1 día · In this work, a research group from the U.K., Netherlands, and Italy designed an experiment so sensitive that it can measure a gravitational force equal to one-quintillionth of a Newton (on the ...
Hace 1 día · However the theory of gravity itself was not accepted quickly. The theory of gravity faced two barriers. First scientists like Gottfried Wilhelm Leibniz complained that it relied on action at a distance, that the mechanism of gravity was "invisible, intangible, and not mechanical". : 339 ...
Hace 5 días · General Relativity and Gravitation is a journal devoted to all theoretical and experimental aspects of modern gravitational physics. Founded in 1970, it ...
Hace 11 horas · In this work we characterize all the static and spherically symmetric vacuum solutions in f(R) gravity when the principal null directions of the Weyl tensor are non-expanding. In contrast to General Relativity, we show that the Nariai spacetime is not the only solution of this type when general f(R) theories are considered. In particular, we find four different solutions for the non-constant ...
Hace 4 días · Violation of Causality in. f. (. Q. ) Gravity. There is ongoing interest in the nonmetricity formulation of gravity. The nonlinear extension of the theory, called f(Q) gravity, has recently been proposed and offers a promising avenue for addressing some of the long-standing challenges in cosmology and fundamental physics. A number of solutions ...
Hace 3 días · 1665-66 – Isaac Newton introduces an inverse-square law of universal gravitation uniting terrestrial and celestial theories of motion and uses it to predict the orbit of the Moon and the parabolic arc of projectiles (the latter using his generalization of the binomial theorem).
Hace 1 día · arXiv:2407.03432v1 [gr-qc] 3 Jul 2024Relational dynamics and Page–Wo. United Kingdom(Dated: July 8, 2024)Group field theory posits that spacetime is emergent and is hence defined without any background notion of space or time; dynamical questions are formulated in relational terms, in particular using (scal.
