Results 11 to 20 of about 676,335 (189)
AdS/BCFT with brane-localized scalar field
Journal of High Energy Physics, 2023 In this paper, we study the dynamics of end-of-the-world (EOW) branes in AdS with scalar fields localized on the branes as a new class of gravity duals of CFTs on manifolds with boundaries.
Hiroki Kanda +4 more
doaj +1 more source
Analytical investigations on non-minimally coupled scalar fields outside neutral reflecting shells
European Physical Journal C: Particles and Fields, 2023 We study the existence of scalar fields outside neutral reflecting shells. We consider static massive scalar fields non-minimally coupled to the Gauss–Bonnet invariant.
Yan Peng
doaj +1 more source
Differences between scalar field and scalar density field solutions [PDF]
Canadian Journal of Physics, 2012 Differences between scalar field and scalar density solutions are explored using a Robertson–Walker (RW) metric, and a nonrelativistic Hamiltonian is derived for a scalar density field in the post-newtonian approximation. The results are compared with those of a scalar field.
Sert I., Pirinççiog˜lu N.
openaire +3 more sources
Construction of inflationary scenarios with the Gauss–Bonnet term and nonminimal coupling
European Physical Journal C: Particles and Fields, 2021 Inflationary models with a scalar field nonminimally coupled both with the Ricci scalar and with the Gauss–Bonnet term are studied. We propose the way of generalization of inflationary scenarios with the Gauss–Bonnet term and a scalar field minimally ...
Ekaterina O. Pozdeeva, Sergey Yu. Vernov
doaj +1 more source
On Mass Spectra of Primordial Black Holes
Frontiers in Astronomy and Space Sciences, 2021 Evidence for the primordial black holes (PBH) presence in the early Universe renews permanently. New limits on their mass spectrum challenge existing models of PBH formation.
Alexander A. Kirillov +2 more
doaj +1 more source
Long-Range Scalar Forces in Five-Dimensional General Relativity
Advances in Mathematical Physics, 2020 We present new results regarding the long-range scalar field that emerges from the classical Kaluza unification of general relativity and electromagnetism.
L. L. Williams
doaj +1 more source
Journal of Mathematical Physics, 1996 Static spherically symmetric uncoupled scalar space–times have no event horizon and a divergent Kretschmann singularity at the origin of the coordinates. The singularity is always present so that nonstatic solutions have been sought to see if the singularities can develop from an initially singular free space–time.
openaire +3 more sources
Universe, 2023 We discuss the problem of the quantization and dynamic evolution of a scalar free field in the interior of a Schwarzschild black hole. A unitary approach to the dynamics of the quantized field is proposed: a time-dependent Hamiltonian governing the ...
Pawel Gusin +5 more
doaj +1 more source
European Physical Journal C: Particles and Fields, 2018 With a suitable decomposition of its energy-momentum tensor into pressureless matter and a vacuum type term, we investigate the spherical gravitational collapse of a minimally coupled, self-interacting scalar field, showing that it collapses to a ...
S. Carneiro, J. C. Fabris
doaj +1 more source
Quantum imploding scalar fields [PDF]
Royal Society Open Science, 2018 The d’Alembertian □ ϕ = 0 has the solution ϕ = f ( v )/ r , where f is a function of a null coordinate v , and this allows creation of a divergent singularity out of nothing.
openaire +4 more sources