Zobrazeno 1 - 10
of 1 323
pro vyhledávání: '"Scalar theories of gravitation"'
Autor:
Jose A. R. Cembranos, Ismael Ayuso
Publikováno v:
E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid
E-Prints Complutense. Archivo Institucional de la UCM
instname
Universidad Complutense de Madrid
E-Prints Complutense. Archivo Institucional de la UCM
instname
We compute the spectrum of scalar models with a general coupling to the scalar curvature. We find that the perturbative states of these theories are given by two massive spin-0 modes in addition to one massless spin-2 state. This latter mode can be i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42620019217cc2aa9166a9c989556a1e
https://eprints.ucm.es/59296/
https://eprints.ucm.es/59296/
Autor:
José P. S. Lemos, Diogo P. L. Bragança
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 7, Pp 1-11 (2018)
European Physical Journal
European Physical Journal
We construct a general stratified scalar theory of gravitation from a field equation that accounts for the self-interaction of the field and a particle Lagrangian, and calculate its post-Newtonian parameters. Using this general framework, we analyze
Publikováno v:
Physics Letters B, Vol 781, Iss, Pp 621-625 (2018)
Physics Letters
Physics Letters
We show that a {\it massless} scalar field in a gravitational wave background can develop a non-zero vacuum expectation value. We draw comparisons to the generation of a non-zero vacuum expectation value for a scalar field in the Higgs mechanism and
Autor:
F. Ahmadi, Yousef Bisabr
Publikováno v:
Physics Letters B
Physics Letters B, Vol 774, Iss C, Pp 671-675 (2017)
Physics Letters B, Vol 774, Iss C, Pp 671-675 (2017)
We have investigated a brane world model in which the gravitational field in the bulk is described both by a metric tensor and a minimally coupled scalar field. This scalar field is taken to be a chameleon with an appropriate potential function. The
Publikováno v:
Russian Physics Journal. 60:299-308
Possible quantum effects, induced by the torsion of spacetime described by its pseudotrace $$ {\overset{\smile }{Q}}^i=\frac{1}{6}{\upvarepsilon}^{iklm}{Q}_{klm} $$ , and by a vortex gravitational field described by its angular velocity $$ {\upomega}
Autor:
Rami Ahmad El-Nabulsi
Publikováno v:
Zeitschrift für Naturforschung A. 72:401-407
A special class of a Gauss–Bonnet minimal power-law cosmology characterised by an effective time-dependent scalar field potential is explored in this communication. Some new features related to the late-time cosmological dynamics are observed and d
Publikováno v:
Astrophysics. 60:142-152
The basic idea behind the evolutionary development of the early universe is that the hot stage was preceded by the inflationary stage. In most modern concepts of the inflationary regime, it is assumed that a specific scalar field (inflaton) is presen
Autor:
Roger Ellman
Publikováno v:
International Journal of Geosciences. :425-443
As a simplified, idealized understanding of a physical system the General Relativity model has been highly successful in its gravitational role. However, it fails to address the problem of sufficiently precise measurement of “Big G”, the Newtonia
Publikováno v:
Physics Letters B
Physics Letters B, Vol 764, Iss C, Pp 87-93 (2017)
Physics Letters B, Vol 764, Iss C, Pp 87-93 (2017)
We study soliton and black hole solutions of Einstein charged scalar field theory in cavity. We examine the effect of introducing a scalar field mass on static, spherically symmetric solutions of the field equations. We focus particularly on the spac
The Experimental Data Validation of Modern Newtonian Gravitation over General Relativity Gravitation
Autor:
Roger Ellman
Publikováno v:
International Journal of Geosciences. :444-461
The paper Connecting Newton’s G With the Rest of Physics-Modern Newtonian Gravitation Resolving the Problem of “Big G’s” Value derived the value of the gravitation constant “Big G”, G of Newton’s Law of Gravitation, directly from other