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29 402 (0,157s) •

Result

Cosmic ray production in modified gravity

This paper is a reply to the criticism of our work on particle production in modified gravity by Gorbunov and Tokareva. We show that their arguments against efficient particle production are invalid. F(R) theories can lead to an eff...

Particles and field physics

  • 2018
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  • Jimp
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Result

Hamiltonian Analysis of Lagrange Multiplier Modified Gravity

We develop a Hamiltonian formalism for Lagrange multiplier modified gravity. We further calculate the Poisson brackets between constraints and we show that they coincide with the algebra of constraints in the Hamiltonian formulation...

BE - Teoretická fyzika

  • 2011
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Result

Can TeVeS be a viable theory of gravity?

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 l...

BE - Teoretická fyzika

  • 2014
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  • Jx
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Result

Note About Hamiltonian Formalism of Modified F(R) Horava-Lifshitz Gravities and Their Healthy Extension

This note is devoted to the study of Hamiltonian formalism of modified F(R) Horava-Lifshitz theories of gravity that were proposed recently in arXiv:1001.4102[hep-th]. We also study Hamiltonian formulation of the healthy extended Ho...

BE - Teoretická fyzika

  • 2010
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  • Jx
Result

Loop Quantum Gravity Phenomenology: Linking Loops to Observational Physics

Review of models and results concerning observational consequences of loop quantum gravity...

BE - Teoretická fyzika

  • 2012
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  • Jx
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Result

Hamiltonian for Weyl transverse gravity

In this short note we determine Hamiltonian for Weyl transverse gravity. We find primary, secondary and tertiary constraints and calculate Poisson brackets between them. We also show that gauge fixing in Weyl transverse gravity lead...

Physical sciences

  • 2024
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  • Jimp
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Result

Reparametrization invariant action for gravity with dynamical determinant of metric

We present manifestly reparametrization invariant action for theory of gravity with dynamical determinant of metric. We show that it is similar to a reparametrization invariant action for unimodular gravity. We determine canonical f...

Particles and field physics

  • 2024
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  • Jimp
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  • Link
Result

Quantum Gravity Phenomenology from the Thermodynamics of Spacetime

of entropy within an area. When low-energy quantum gravity effects are considered present the derivation of the quantum modified gravitational dynamics from this modified entropy expression and discuss its main features. F...

Physical sciences

  • 2022
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  • Jimp
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Result

Conformal traceless decomposition of lagrange multiplier modified Hořava?Lifshitz Gravity

We introduce conformal traceless decomposition in Lagrange Multiplier modified RFDiff invariant Hořava?Lifshitz gravity. We perform Hamiltonian analysis of given action and determine the action for the physical degrees of freedom....

BE - Teoretická fyzika

  • 2015
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  • Jx
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Result

Gravitational alternatives to dark matter with tensor mode speed equaling the speed of light

A number of theories of gravity have been proposed as proxies for dark matter the speeds of gravity and light, severely restricting the phenomenological viability paradigm of relativistic modified Newtonian dynamics (MOND) ...

Astronomy (including astrophysics,space science)

  • 2019
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  • Jimp
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