Results 11 to 20 of about 676,684 (291)
Rotating scalar field wormhole [PDF]
Classical and Quantum Gravity, 2006 Sign of the exponential in equation (10) has been changed.
Matos, Tonatiuh, Nunez, Dario
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Scalar field inhomogeneous cosmologies [PDF]
Journal of Mathematical Physics, 1995 Some exact solutions for the Einstein field equations corresponding to inhomogeneous G2 cosmologies with an exponential-potential scalar field, which generalize solutions obtained previously, are considered. Several particular cases are studied and the properties related to generalized inflation and asymptotic behavior of the models are discussed.
Feinstein, Alexander +2 more
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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.
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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
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Vacuum Radiation from Massive Scalar Field
Universe, 2022 The vacuum radiation of a massive scalar field is studied by means of a single moving mirror. The field equation with an arbitrary-shaped mirror moving in (d+1) dimensions is given perturbatively in the non-relativistic limit.
Yu-Song Cao
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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.
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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
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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
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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.
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Physics Letters B, 2018 Nous obtenons un sous-groupe du groupe d'isométrie de pAdS (une version p-adique de AdS alternative à l'arbre Bruhat–Tits). Nous proposons un candidat pour l'action en vrac scalaire et l'équation de mouvement sur pAdS, et élaborons des expressions analytiques des fonctions du Vert pour un choix particulier de paramètre avec un ansatz pour les cas ...
Feng Qu, Yi-hong Gao
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