Bimetric gravity
WebBimetric definition: (mathematics, physics) Describing any system that may be described using two metrics. . WebSep 21, 2024 · In bigravity, gravitational interactions are mediated by two gravitons, one of which has mass and the other of which is massless. The two gravitons are composed of different combinations (or...
Bimetric gravity
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WebOct 4, 2013 · We derive dynamical and gravitational lensing properties of local sources in the Hassan-Rosen bimetric gravity theory. Observations of elliptical galaxies rule out … WebA key feature of the new theory, named bimetric gravity (or bigravity), is that both metrics are dynamical contrary to the massive gravity theories so far. For reviews on the subject of massive gravity and bimetric gravity see e.g. [14–16]. Bimetric gravity has been studied extensively in recent years with still continuing activity [17–21].
Bimetric gravity or bigravity refers to two different classes of theories. The first class of theories relies on modified mathematical theories of gravity (or gravitation) in which two metric tensors are used instead of one. The second metric may be introduced at high energies, with the implication that the speed … See more In general relativity (GR), it is assumed that the distance between two points in spacetime is given by the metric tensor. Einstein's field equation is then used to calculate the form of the metric based on the distribution of … See more • Alternatives to general relativity • DGP model • Scalar–tensor theory See more Since 2010 there has been renewed interest in bigravity after the development by Claudia de Rham, Gregory Gabadadze, and Andrew Tolley (dRGT) of a healthy theory of massive gravity. Massive gravity is a bimetric theory in the sense that nontrivial … See more WebFeb 15, 2011 · @article{osti_21579843, title = {Bimetric renormalization group flows in quantum Einstein gravity}, author = {Manrique, Elisa and Reuter, Martin and Saueressig, Frank}, abstractNote = {Research Highlights: > Gravitational Effective Action in the bimetric truncation. > First study of the full gravitational flow with a bimetric structure. > The non …
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. WebJan 15, 2013 · In massive gravity and in bimetric theories of gravity, two constraints are needed to eliminate the two phase-space degrees of freedom of the Boulware-Deser ghost.
WebMar 20, 2024 · PDF Bimetric gravity, is a theory of gravity that posits the existence of two interacting and dynamical metric tensors. The spectrum of bimetric... Find, read and …
WebThe Hasan-Rosen formulation of bimetric gravity can schematically be written as [1]: L b i = L g + L f + L i n t. where L g is the Einstein-Hilbert action for metric g μ ν and similarly for metric f μ ν. The interesting part really lies in the interaction term. This interaction term can schematically be written as: chilly relationshipWebSep 16, 2011 · Generically, non-linear bimetric theories of gravity suffer from the same Boulware-Deser ghost instability as non-linear theories of massive gravity. However, … grade 10 statistics testWebMar 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 a massless and a massive spin-2... Skip to main content We gratefully acknowledge support fromthe Simons Foundation and member institutions. >gr-qc>arXiv:2303.11353v1 chilly reliefWebMay 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 … chilly rhino jacksonvilleWebJan 4, 2024 · 14, 15] through his construction of a bimetric theory of gravity. In [16] a bimetric. gravity w as obtained from ghost-free massive gravit y. Our theory developed here. grade 10 southern province papers 2021WebJan 26, 2024 · Bimetric gravity is an interesting alternative to standard GR given its potential to provide a concrete theoretical framework for a ghost-free massive gravity … chilly returnsWebSep 2, 2015 · Bimetric gravity Bigravity “The reports of my death have been greatly exaggerated.” — Metrics Twain 1. Introduction The Standard Model of particle physics contains fields with spins 0, 1/2, and 1, describing matter as well as the strong and electroweak forces. chilly refreshing way