Results 31 to 40 of about 275,111 (343)
Scalar–tensor theories with an external scalar [PDF]
General Relativity and Gravitation, 2016 Scalar-tensor (ST) gravity is considered in the case where the scalar is an external field. We show that General Relativity (GR) and usual ST gravity are particular cases of the External Scalar-Tensor (EST) gravity. It is shown with a particular cosmological example that it is possible to join a part of a GR solution to a part of a ST one such that the
Chauvineau, Bertrand +2 more
openaire +4 more sources
Kuwait Journal of Science, 2021 In this work, interval-valued optimization problems are considered. Ordering cone is used in order to obtain a generalization of interval-valued optimization problems on real topological vector spaces.
Emrah KARAMAN
doaj +1 more source
Radial perturbations of scalar-Gauss-Bonnet black holes beyond spontaneous scalarization [PDF]
Physical Review D, 2022 Spontaneous scalarization of black holes in scalar-Gauss-Bonnet (sGB) gravity is a very interesting phenomenon allowing black holes to circumvent the no-hair theorem and acquire scalar hair while leaving the weak field regime of the theory practically ...
Jose Luis Blázquez-Salcedo +3 more
semanticscholar +1 more source
Twenty years of continuous multiobjective optimization in the twenty-first century
EURO Journal on Computational Optimization, 2021 The survey highlights some of the research topics which have attracted attention in the last two decades within the area of mathematical optimization of multiple objective functions.
Gabriele Eichfelder
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Spontaneous scalarization of black holes in Gauss-Bonnet teleparallel gravity [PDF]
Physical Review D, 2022 In this paper, we find new scalarized black holes by coupling a scalar field with the Gauss-Bonnet invariant in Teleparallel gravity. The Teleparallel formulation of this theory uses torsion instead of curvature to describe the gravitational interaction ...
S. Bahamonde +4 more
semanticscholar +1 more source
Journal of Cosmology and Astroparticle Physics, 2020 We provide a complete classification of Poincar'e-invariant scalar field theories with an enlarged set of classical symmetries to leading order in derivatives, namely for the so-called P(X,ϕ) theories, in two or more spacetime dimensions. We find only three possibilities: Dirac-Born-Infeld, Cuscuton and Scaling theories.
Grall, Tanguy +2 more
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Dynamical spontaneous scalarization in Einstein-Maxwell-scalar theory [PDF]
Chinese Physics C, High Energy Physics & Nuclear Physics, 2022 We study the linear instability and the nonlinear dynamical evolution of the Reissner-Nordstr\"om (RN) black hole in the Einstein-Maxwell-scalar theory in asymptotic flat spacetime.
Wei Xiong +4 more
semanticscholar +1 more source
Scalar perturbations in scalar field quantum cosmology [PDF]
Physical Review D, 2009 In this paper it is shown how to obtain the simplest equations for the Mukhanov-Sasaki variables describing quantum linear scalar perturbations in the case of scalar fields without potential term. This was done through the implementation of canonical transformations at the classical level, and unitary transformations at the quantum level, without ever ...
Falciano, F. T., Pinto-Neto, Nelson
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Spin-Induced Black Hole Scalarization in Einstein-Scalar-Gauss-Bonnet Theory. [PDF]
Physical Review Letters, 2020 We construct black hole solutions with spin-induced scalarization in a class of models where a scalar field is quadratically coupled to the topological Gauss-Bonnet term.
E. Berti +3 more
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A Generalized Scalarization Method for Evolutionary Multi-objective Optimization [PDF]
AAAI Conference on Artificial Intelligence, 2022 The decomposition-based multi-objective evolutionary algorithm (MOEA/D) transforms a multi-objective optimization problem (MOP) into a set of single-objective subproblems for collaborative optimization.
Rui-Hao Zheng, Zhen-Kun Wang
semanticscholar +1 more source