Disformal transformation

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August undefined, 2024

WebMar 29, 2024 · I want to define two metrics with the disformal transformation relation g ¯ μ ν = A ( ϕ) g μ ν + B ( ϕ) ∇ μ ϕ ∇ μ ϕ, where g μ ν is the first metric, g ¯ μ ν is the second metric, ϕ is a scalar field and ∇ μ is the covariant derivative, μ and ν are both abstract indices. For the simpler conformal transformation relation g ¯ μ ν = A ( ϕ) g μ ν, WebJul 22, 2024 · Interestingly enough, we show that the disformal transformation, generated by this scalar field, and with a constant degree of disformality, leaves invariant (up to diffeomorphisms) the Myers–Perry metric with equal momenta.

Disform Definition & Meaning - Merriam-Webster

WebDec 7, 2024 · Fear of inadequacy, underperformance, discipline, job displacement, and other types of fears can result in changes to behavior. A lack of skills. A lack of … WebDec 4, 2024 · The disformal transformation maps a solution in a class of the scalar-tensor or vector-tensor theories to that in another class, and hence it can be a useful tool to … tricalcium phosphate vegan

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WebOct 7, 2014 · The disformal transformation has been argued in terms of applications to the specific cosmological problems, and more recently has been focused as the way to … WebSep 1, 2014 · Disformal transformations, veiled General Relativity and Mimetic Gravity. Nathalie Deruelle 1 and Josephine Rua 2. Published 1 September 2014 • © 2014 IOP … WebFeb 13, 2024 · We study thermodynamics in f ( R ) gravity with the disformal transformation. The transformation applied to the matter Lagrangian has the form of γ μ ν = A ( ϕ , X ) g μ ν + B ( ϕ , X ) ∂ μ ϕ ∂ ν ϕ with the assumption of the Minkowski matter metric γ μ ν = η μ ν , where ϕ is the disformal scalar and Xis the corresponding kinetic term of ϕ . teri horton sells painting 2014

Transformation of primordial cosmological perturbations under the ...

Disformal transformations, veiled General Relativity and …

WebJan 4, 2024 · We consider a higher-derivative generalization of disformal transformations in D -dimensional spacetime and clarify the conditions under which they form a group with respect to the matrix product and the functional composition. These conditions allow us to systematically construct the inverse transformation in a fully covariant manner. WebMay 11, 2015 · The disformal transformation of the metric is just a generalized change of units, thus this operation on the field variable of the theory does not introduce any new input or new constraint. Exactly because of this reason we call our finding an “induced geometry” from disformal transformation. 3.3. Gauge transformation teri howell guild mortgageWebDec 3, 2014 · Indeed, one can always set to unity the speed of propagation of gravitational waves during inflation by a suitable disformal transformation of the metric, while a conformal one can make the Planck mass time independent. Therefore, the tensor amplitude unambiguously fixes the energy scale of inflation. tricalcium phosphate supplements

"WebDisformal transformation, in general, relates the space-time geometries between two frames. These transformations relate two space-time geometries through a conformal factor (a scalar field) and also through the first-order derivatives of the scalar field, with the coefficient of the latter known as the disformal factor. " - Disformal transformation

Disformal transformation

WebOct 14, 2013 · Here, we argue that disformal transformations play, for the Horndeski theory, a similar role to that of conformal transformations for scalar-tensor theories a là Brans–Dicke. We identify the most general transformation preserving second-order field equations and discuss the issue of viable frames for this kind of theory, in particular, the ... WebApr 11, 2024 · Two-field mimetic gravity was recently realized by looking at the singular limit of the conformal transformation between the auxiliary metric and the physical metric with two scalar fields involved. In this paper, we reanalyze the singular conformal limit and find a more general solution for the conformal factor A, which greatly broadens the form of two …

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WebINIS Repository Search provides online access to one of the world's largest collections on the peaceful uses of nuclear science and technology. The International Nuclear Information System is operated by the IAEA in collaboration with over 150 members. WebDisplacive transformation: Rearrangement of atoms from one crystal structure to another structure without a change in the density (or volume) of the material. Electron valence …

WebNov 25, 2024 · A disformal transformation involving the first derivative of a scalar field is a natural extension of a conformal transformation . The next natural question is … WebMay 11, 2015 · The disformal transformation of the metric is just a generalized change of units, thus this operation on the field variable of the theory does not introduce any new …

WebOct 26, 2016 · A disformal transformation is a very useful tool to analyze a general effective theory description of inflation. It can for example be used to set the tensor … WebSince the employed disformal transformation is singular, it is possible that in the new frame there is a matter-gravity coupling that becomes singular. This is not necessarily the case, however. The disformal transformation involves the scalar field.

WebMar 1, 2024 · In the last few years, disformal transformations have been used as a simple modification of the spacetime metric, due to the presence of a given field (scalar, vector or spinor), that can help...

WebDec 16, 2024 · Disformal transformations have been considered by Bekenstein as a deformation of the metric tensor that defines a gravitational theory supplied by … teri howardWebJun 13, 2024 · We investigate both the null energy condition (NEC) violating scenario and the c T-diminishing scenario for generating enhanced power spectrum of primordial gravitational waves (GWs) during inflation, where c T is the propagating speed of primordial GWs. Both of these two scenarios can be realized stably with theories beyond … teri howes tricalcium phosphate teethWebdisformal transformation; 98.80−k; 04.50.Kd; Modified theories of gravity; General Relativity and Quantum Cosmology; Astrophysics - Cosmology and Nongalactic Astrophysics; High Energy Physics - Theory E-Print: 17 pages, one table, added appendix B for the full expression for the transformed hatted X, Y, and Z tricalcium phosphatesWebSystem & Behavior Transformation: At Transformational Solutions, our associates know that it is job 1 to ensure that the plans vision and plan that was created in the earlier … teri hudson obituaryWebThe meaning of DISFORM is deform. Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam … tricalcium phosphate tcpWebAlthough the conformal transformation in non-relativistic holography can easily be rephrased in terms of Newton–Cartan geometry, we show that it requires a nontrivial procedure to arrive at the... tricalcium phosphate usp