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   Articles with "nonminimally coupled" as a keyword



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Absorption and radiation of nonminimally coupled scalar field from charged BTZ black hole

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recommendations! Published in 2018 at "General Relativity and Gravitation"

DOI: 10.1007/s10714-018-2396-y

Abstract: In this paper we investigate the absorption and radiation of nonminimally coupled scalar field from the charged BTZ black hole. We find the analytical expressions for the reflection coefficient, the absorption cross section and the… read more here.

Keywords: absorption; coupled scalar; nonminimally coupled; scalar field ... See more keywords
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Nonminimally coupled Boltzmann equation: Foundations

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recommendations! Published in 2020 at "Physical Review D"

DOI: 10.1103/physrevd.102.084051

Abstract: We derive the Boltzmann equation in the context of a gravity theory with non-minimal coupling between matter and curvature. We show that as the energy-momentum tensor is not conserved in these theories, it follows a… read more here.

Keywords: nonminimally coupled; equation foundations; coupled boltzmann; equation ... See more keywords
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Nonlinear electrodynamics nonminimally coupled to gravity: Symmetric-hyperbolicity and causal structure

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recommendations! Published in 2022 at "Physical Review D"

DOI: 10.1103/physrevd.105.024021

Abstract: It is shown here that symmetric hyperbolicity, which guarantees well-posedness, leads to a set of two inequalities for matrices whose elements are determined by a given theory. As a part of the calculation, carried out… read more here.

Keywords: symmetric hyperbolicity; electrodynamics nonminimally; electrodynamics; nonlinear electrodynamics ... See more keywords
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Attractor cosmology from nonminimally coupled gravity

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recommendations! Published in 2018 at "Physical Review D"

DOI: 10.1103/physrevd.97.064005

Abstract: By using a bottom-up reconstruction technique for nonminimally coupled scalar-tensor theories, we realize the Einstein frame attractor cosmologies in the Ω(ϕ)-Jordan frame. For our approach, what is needed for the reconstruction method to work is… read more here.

Keywords: cosmology; nonminimally coupled; attractor; einstein frame ... See more keywords
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Classes of nonminimally coupled scalar fields in spatially curved FRW spacetimes

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recommendations! Published in 2019 at "Physical Review D"

DOI: 10.1103/physrevd.99.123516

Abstract: In this work we perform a dynamical analysis of a broad class of non-minimally coupled real scalar fields in the Friedmann-Robertson-Walker (FRW) spacetime framework. The first part of our study concerns the dynamics of an… read more here.

Keywords: nonminimally coupled; coupled scalar; scalar fields; classes nonminimally ... See more keywords
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Scalar charges and pulsar-timing observables in the presence of nonminimally coupled scalar fields

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recommendations! Published in 2019 at "Physical Review D"

DOI: 10.1103/physrevd.99.124003

Abstract: Pulsar-timing has become a celebrated tool for probing modifications to General Relativity in the strong-field surroundings of neutron stars. Here we investigate whether scalar-tensor theories that incorporate a nonminimally coupled scalar degree of freedom may… read more here.

Keywords: nonminimally coupled; presence; coupled scalar; charges pulsar ... See more keywords