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Bimetric gravity

WebDec 11, 2024 · 1 Massive and Bimetric Gravity Considering gravity in the field-theoretical framework, a natural theoretical question arises to whether the graviton particle itself could be a massive particle. In the same way as the particles in the standard model acquire a mass, could the spin-2 particle be endowed with a mass term? Web* Idea: A theory of gravity with two distinct metrics, a gravitational gab which describes the geometry of spacetime and controls the speed of gravity, and a matter metric γab which …

[1109.3515] Bimetric Gravity from Ghost-free Massive Gravity

http://export.arxiv.org/abs/1109.3515 WebIn the mathematical field of differential geometry, the Riemann curvature tensor or Riemann–Christoffel tensor (after Bernhard Riemann and Elwin Bruno Christoffel) is the most common way used to express the curvature of Riemannian manifolds.It assigns a tensor to each point of a Riemannian manifold (i.e., it is a tensor field).It is a local … intertec group qatar https://waltswoodwork.com

Protophysics and the Meaning of Space-time Geometry

WebMay 26, 2024 · Bimetric gravity theories describes gravitational interactions in the presence of an extra spin-2 field. The Hassan–Rosen (HR) nonlinear massive minimal bigravity theory is a ghost-free bimetric theory formulated with respect a flat, dynamical reference metric. WebIn the bimetric scalar–tensor gravitational theory there are two frames associated with the two metrics ĝ μν and g μν, which are linked by the gradients of a scalar field ϕ.The choice of a comoving frame for the metric ĝ μν or g μν has fundamental physical consequences for local observers in either metric spacetimes, while maintaining diffeomorphism invariance. WebMay 3, 2024 · Ghost-free bimetric gravity is an extension of general relativity, featuring a massive spin-2 field coupled to gravity. We parameterize the theory with a set of observables having specific physical interpretations. new garden cafe

Bimetric renormalization group flows in quantum Einstein gravity ...

Category:[2303.11353] Bimetric-Affine Quadratic Gravity

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Bimetric gravity

[2303.11353] Bimetric-Affine Quadratic Gravity

WebMar 20, 2024 · Bimetric gravity, is a theory of gravity that posits the existence of two interacting and dynamical metric tensors. The spectrum of bimetric gravity consists of … WebMay 1, 2015 · Bimetric variational formalism was recently employed to construct novel bimetric gravity models. In these models an affine connection is generated by an additional tensor field which is independent of the physical metric.

Bimetric gravity

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WebTitle: Bimetric-Affine Quadratic Gravity Authors: Ioannis D. Gialamas, Kyriakos Tamvakis. Comments: 11 pages, 2 figures Subjects: General Relativity and Quantum Cosmology (gr-qc); Cosmology and Nongalactic Astrophysics (astro-ph.CO); High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Theory (hep-th) WebJul 8, 2013 · Abstract. This paper is devoted to the Hamiltonian analysis of bimetric gravity in vierbein formulation. We identify all constraints and determine their nature. We show that there are no ...

WebOct 4, 2013 · In order to have background solutions resembling the concordance cosmological model, without fine-tuning of the parameters of the model, we are restricted to the upper interval, or λ g / r H ~ 1, for which the Vainshtein mechanism is expected to restore general relativity for local sources. WebAug 1, 2014 · bimetric gravity formulated in the vierbein formalism where. the spin connection is treated as an independent field was. performed with elegant formulations of the secondary con-

WebJul 29, 2010 · Gravimetric definition, of or relating to measurement by weight. See more.

WebThe presence of Nambu–Goldstone bosons introduce a natural degeneracy inside the vacuum solutions of the nonlinear formulations of massive gravity in the same spirit of the [Formula: see text]-models. When the gravitational effects are taken into

WebFeb 18, 2016 · Bi-gravity can get very complicated but many of the complications about what the degrees of freedom mean also appear in the standard model, at least in spirit. … inter-tech 12v 7.5a 90wTheories of gravity can be classified, loosely, into several categories. Most of the theories described here have: • an 'action' (see the principle of least action, a variational principle based on the concept of action) • a Lagrangian density intertech 22 pistols for saleWebThe work is carried through in metric gravity for the class of Christoudoulou-Klainermann space-times, in which the temporal evolution is ruled by the {\it weak} ADM energy. The main results of the investigation are the following: 1) A re-interpretation of {\it active} diffeomorphisms as {\it passive and metric-dependent} dynamical symmetries ... new garden chepstowWebMay 17, 2013 · We consider the issues that arise out of interpreting the ghost-free bimetric theory as a theory of a spin-2 field coupled to gravity. This requires identifying a gravitational metric and parameterizing deviations of … new garden chepstow menuWebNov 29, 2014 · General Relativity and Gravitation - The possibility of matter coupling to two metrics at once is considered. This appears natural in the most general ghost-free, bimetric theory of gravity, where... The possibility of matter coupling to … new garden caballitoWebTitle: Cosmological Solutions in Bimetric Gravity and their Observational Tests Authors: Mikael von Strauss, Angnis Schmidt-May, Jonas Enander, Edvard Mortsell, S. F. Hassan, Comments: 24 pages arXiv:1109.3515 [hep-th] [abs, ps, pdf, other]: Title: Bimetric Gravity from Ghost-free Massive Gravity Authors: S. F. Hassan Rachel A. Rosen new garden caldicot onlinehttp://export.arxiv.org/abs/1109.3515 new garden caldicot