Disformal transformation

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August undefined, 2024

WebAlthough 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... WebJul 8, 2024 · Figure 5: Deformable convolution using a kernel size of 3 and learned sampling matrix. Instead of using the fixed sampling matrix with fixed offsets, as in standard …

Symmetry Free Full-Text Disformal Transformations in …

WebMar 2, 2024 · Mimetic gravity is a Weyl-symmetric extension of General Relativity, related to the latter by a singular disformal transformation, wherein the appearance of a dust-like perfect fluid can mimic cold dark matter at a cosmological level. Within this framework, it is possible to provide a unified geometrical explanation for dark matter, the late-time … Web1. Transformation of objects can be used to define the concepts of congruence and similarities. 2. Coordinate geometry can be a useful tool for understanding geometric … find the magic banger

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WebJun 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 … WebJan 31, 2024 · For more general disformal transformations relating gravitational and physical geometries, we show how to establish this equivalence by taking the quantum effects inside the disformal degrees... WebFeb 1, 2024 · We show that the effective theory describing single component continuous media with a linear and constant equation of state of the form p = w ρ is invariant under a 1-parameter family of continuous disformal transformations. In the special case of w =1/3 (ultrarelativistic gas), such a family reduces to conformal transformations. erie county democratic committee members

Disformal invariance of continuous media with linear equation of …

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 … 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. erie county demsWebMar 29, 2024 · In particular, we study if cosmological observables such as the galaxy number counts and weak lensing observables are invariant under the disformal transformations. In a previous work, it was... find the magic dazzlings

"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 " - Disformal transformation

Disformal transformation

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WebA template of the spectrum is given for the NEC-violating scenario. We also discuss the underlying relation and discrepancy between these two scenarios with a disformal transformation. Keywords. Cosmology of Theories BSM Classical Theories of Gravity 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 …

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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... WebWe investigate the cosmological background evolution and perturbations in a general class of spatially covariant theories of gravity, which propagates two tensor modes and one …

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 … 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 …

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. 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 ...

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 …

WebAug 23, 2024 · The Klein-Gordon equation, one of the most fundamental equations in field theory, is known to be not invariant under conformal transformation. However, its massless limit exhibits symmetry under Bekenstein's disformal transformation, subject to some conditions on the disformal part of the metric variation. In this study, we explore the … find the magic numberWebSystem & 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 … find the magic banger vampire survivorsWebApr 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 … erie county department of agingWebTo examine how the disformal transformation will affect the f(R) gravity theory in cosmology, we assume our space to be homogeneous and isotropic. As a result, the … find the magic keyWebINIS 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. find the maclaurin series of f x cos xWebFeb 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 . erie county dentistsWebJul 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. erie county department of elections