The gravitational field of a star in quadratic gravity
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/08/050
Abstract: The characterization of the gravitational field of isolated objects is still an open question in quadratic theories of gravity. We study static equilibrium solutions for a self-gravitating fluid in extensions of General Relativity including terms… read more here.
Keywords: field star; star quadratic; quadratic gravity; gravitational field ... See more keywords
Naked singularities in quadratic f(R) gravity
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.101.124046
Abstract: We find new static, spherically symmetric, and asymptotically flat vacuum solutions without horizon in Starobinsky's quadratic f(R) gravity. We systematically classify these solutions by an asymptotic analysis around the origin and find seven different integer… read more here.
Keywords: singularities quadratic; naked singularities; gravity; quadratic gravity ... See more keywords
Scale-invariant quadratic gravity and inflation in the Palatini formalism
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review D"
DOI: 10.1103/physrevd.104.023521
Abstract: In the framework of classical scale invariance, we consider quadratic gravity in the Palatini formalism and investigate the inflationary predictions of the theory. Our model corresponds to a two-field scalar-tensor theory, that involves the Higgs… read more here.
Keywords: model; quadratic gravity; scale; palatini formalism ... See more keywords
Bimetric-affine quadratic gravity
Sign Up to like & getrecommendations! Published in 2023 at "Physical Review D"
DOI: 10.1103/physrevd.107.104012
Abstract: Bimetric gravity, is a theory of gravity that posits the existence of two interacting and dynamical metric tensors. The spectrum of bimetric gravity consists of a massless and a massive spin-2 particle. The form of… read more here.
Keywords: gravity; bimetric affine; affine quadratic; quadratic gravity ... See more keywords
Pure double-layer bubbles in quadratic F (R ) gravity
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review D"
DOI: 10.1103/physrevd.95.124021
Abstract: Fil: Eiroa, Ernesto Fabian. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Oficina de Coordinacion Administrativa Ciudad Universitaria. Instituto de Astronomia y Fisica del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales.… read more here.
Keywords: quadratic gravity; layer bubbles; bubbles quadratic; double layer ... See more keywords
Gauge Assisted Quadratic Gravity: A Framework for UV Complete Quantum Gravity
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review D"
DOI: 10.1103/physrevd.97.126005
Abstract: We discuss a variation of quadratic gravity in which the gravitational interaction remains weakly coupled at all energies, but is assisted by a Yang-Mills gauge theory which becomes strong at the Planck scale. The Yang-Mills… read more here.
Keywords: quadratic gravity; assisted quadratic; gauge assisted; quantum gravity ... See more keywords
Characterizing black hole metrics in quadratic gravity
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.99.101501
Abstract: The recent discovery of non-Schwarzschild black hole spacetimes has opened new directions of research in higher-derivative gravitational theories. However, despite intense analytical and numerical efforts, the link with the linearized theory is still poorly understood.… read more here.
Keywords: hole metrics; black hole; metrics quadratic; characterizing black ... See more keywords