Scalar-tensor-vector gravity theory

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August undefined, 2024

WebMotivation. Gravity, at the classical level, is described by Einstein's field equations of general relativity, + =.These equations combine the spacetime geometry encoded in the metric with the matter content comprised in the energy–momentum tensor.The quantum nature of matter has been tested experimentally, for instance quantum electrodynamics is by now … WebMar 6, 2006 · A covariant scalar–tensor–vector gravity theory is developed which allows the gravitational constant G, a vector field coupling ω and the vector field mass μ to vary with …

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WebApr 12, 2024 · The generalized SU(2) Proca theory is a vector-tensor modified gravity theory where the action is invariant under both diffeomorphisms and global internal … In theoretical physics, a scalar–tensor theory is a field theory that includes both a scalar field and a tensor field to represent a certain interaction. For example, the Brans–Dicke theory of gravitation uses both a scalar field and a tensor field to mediate the gravitational interaction. the last word 2018 movie posters

The Scalar-Tensor Theory of Gravitation - Cambridge Core

WebSep 15, 2024 · In the context of the most general scalar–vector–tensor theory, we study the stability of static spherically symmetric black holes under linear odd-parity perturbations. … WebJan 25, 2024 · Independently, Moffat [ 11] postulated the Scalar–Tensor–Vector Gravity theory (STVG), also referred as Modified Gravity theory (MOG) in the literature. In STVG, the gravitational coupling constant G is reified to a scalar field whose numerical value usually exceeds Newton’s constant G_ {\mathrm {N}}. WebFeb 21, 2024 · On this theory, gravitational waves propagate on a separate metric from baryonic matter. Consequently, the different geodesics assigned to gravitational waves and electromagnetic radiation result in different propagation speeds [9, 10, 20].TeVeS has the distinction of being both a fully Lorentz covariant and internally consistent MONDian … the last word ben bailey smith

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Scalar-tensor-vector gravity theory

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WebJul 30, 2014 · Among modified gravitational theories, the Tensor–Vector–Scalar (TeVeS) occupies a special place – it is a covariant theory of gravity that produces the modified Newtonian dynamics (MOND) in the nonrelativistic weak field limit and explains the astrophysical data at scales larger than that of the Solar System, without the need of an … WebApr 11, 2024 · Abstract. The astrophysical consequences of the presence of a quintessence scalar field on the evolution of the horizon and on the accretion disk surrounding a static black hole, in the Scalar-Vector-Tensor version of Modified Gravity (MOG), are investigated.

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WebScalar fields play an important role in the description of cosmological evolution [].With the introduction of scalar fields in the Einstein–Hilbert Action, the new degrees of freedom drive the dynamics of the cosmological parameters such that they explain the cosmological observations [2,3].The quintessence scalar field model is a very simple model that … WebThe scalar-tensor theory of gravitation is one of the most popular alternatives to Einstein's theory of gravitation. This book provides a clear and concise introduction to the theoretical ideas and developments, …

WebIn scalar–tensor theories, the latter can be classified using the type of interaction as a phenomenological criterion. It can depend on the local field value as in the cases of … WebIn physics, the Brans–Dicke theory of gravitation (sometimes called the Jordan–Brans–Dicke theory) is a competitor to Einstein's general theory of relativity.It is an example of a scalar–tensor theory, a gravitational theory in which the gravitational interaction is mediated by a scalar field as well as the tensor field of general relativity. . …

WebIn Brans–Dicke gravity, the scalar field is sourced by the matter stress energy tensor only, and the inverse of the scalar field is the variable G. Note from (46) the scalar field does not divide the stress energy tensor, so it is not G that is varying. The solutions of (46) to (49) for cases of radiation and vacuum have been worked out for ... WebIn §4, we consider the eﬀective gravity theory on the brane in various limits. ... there is no contribution from the vector-type 458 M. Minamitsuji and M. Sasaki tensor harmonics …

WebFeb 23, 2015 · In scalar-tensor gravity, the second metric {\hat g}_ {\mu\nu} is related to the non-minimal coupling of the Brans-Dicke-like scalar. In the Palatini formalism the non-minimal coupling and the scalar field are separated from the metric structure of space-time.

WebJan 25, 2024 · Scalar-Tensor-Vector Gravity (STVG), also referred as Modified Gravity (MOG), is an alternative theory of the gravitational interaction. Its weak field … the last word ann arbor michiganWebgravity. Scalar-tensor theories are among the simplest and best studied extensions of GR [19]. In addition to the metric, in these theories gravity is also mediated by a scalar eld. … the last word bookshop philadelphiaWebJun 3, 2005 · A covariant scalar–tensor–vector gravity theory is developed which allows the gravitational constant G, a vector field coupling ω and the vector field mass μ to vary with … the last word ann arbor hoursWebIn Brans–Dicke gravity, the scalar field is sourced by the matter stress energy tensor only, and the inverse of the scalar field is the variable G. Note from (46) the scalar field does … the last word bar ann arborWebAug 1, 2016 · A general theory of linear cosmological perturbations: scalar-tensor and vector-tensor theories Full Record Related Research Abstract We present a method for parametrizing linear cosmological perturbations of theories of gravity, around homogeneous and isotropic backgrounds. the last word bookstore charlotte ncWebApr 24, 2024 · Scalar Tensor Vector Gravity (STVG) or MOdified Gravity (MOG) is a metric theory of gravity with dynamical scalar fields and a massive vector field introduced in addition to the... the last word bookstore marylandWebApr 15, 2024 · We have probed a cosmological model in f(R) gravity, which is a cubic equation in scalar curvature R. The terms arise due to nonlinear f(R) functions being … thyroid lifter reviews