Absorption and radiation of nonminimally coupled scalar field from charged BTZ black hole
Sign Up to like & getrecommendations! 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
Heat Transport Through an Open Coupled Scalar Field Theory Hosting Stability-to-Instability Transition
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DOI: 10.1007/s10955-024-03341-5
Abstract: We investigate heat transport through a one-dimensional open coupled scalar field theory, depicted as a network of harmonic oscillators connected to thermal baths at the boundaries. The non-Hermitian dynamical matrix of the network undergoes a… read more here.
Keywords: bath; heat; heat transport; coupled scalar ... See more keywords
Entropy of black holes coupled to a scalar field
Sign Up to like & getrecommendations! Published in 2023 at "Physical Review D"
DOI: 10.1103/physrevd.107.104022
Abstract: The Hamiltonian approach to black hole entropy, recently proposed in the framework of Poincar\'e gauge theory, is extended by including the scalar matter. The improved approach is used to analyse asymptotic charges and entropy of… read more here.
Keywords: scalar field; coupled scalar; holes coupled; entropy black ... See more keywords
Nonminimally coupled scalar field in Schwarzschild–de Sitter spacetime: Geodesic synchrotron radiation
Sign Up to like & getrecommendations! Published in 2024 at "Physical Review D"
DOI: 10.1103/physrevd.109.104024
Abstract: We analyze the scalar radiation emitted by a source interacting with a nonminimally coupled scalar field in four-dimensional Schwarzschild--de Sitter spacetime. We obtain the emission probability using quantum field theory in curved spacetimes at tree… read more here.
Keywords: field; spacetime; radiation; scalar field ... See more keywords
Dissecting a strongly coupled scalar nucleon
Sign Up to like & getrecommendations! Published in 2024 at "Physical Review D"
DOI: 10.1103/physrevd.110.076025
Abstract: We continue our investigation of the stress within a strongly coupled scalar nucleon, and now dissect the gravitational form factors into contributions from its constituents, the (mock) nucleon and the (mock) pion. The computation is… read more here.
Keywords: nucleon; dissecting strongly; scalar nucleon; strongly coupled ... See more keywords
Classes of nonminimally coupled scalar fields in spatially curved FRW spacetimes
Sign Up to like & getrecommendations! 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
Scalar charges and pulsar-timing observables in the presence of nonminimally coupled scalar fields
Sign Up to like & getrecommendations! 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
Displacement Convexity in Spatially Coupled Scalar Recursions
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DOI: 10.1109/tit.2018.2864728
Abstract: We introduce a technique for the analysis of general spatially coupled systems that are governed by scalar recursions. Such systems can be expressed in variational form in terms of a potential function. We show, under… read more here.
Keywords: spatially coupled; coupled scalar; convexity spatially; displacement convexity ... See more keywords