Zobrazeno 1 - 10
of 20
pro vyhledávání: '"J. B. Fonseca-Neto"'
Publikováno v:
Physical Review D. 94
We discuss the G\"{o}del-type solutions within the dynamical Chern-Simons modified gravity in four dimensions. Within our study, we show that in the vacuum case the causal solutions are possible which cannot take place within the non-dynamical framew
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af683d264081ea54939fb96b6096ab1e
https://doi.org/10.1103/physrevd.94.104057
https://doi.org/10.1103/physrevd.94.104057
Autor:
J. B. Fonseca-Neto, A. F. Santos, J. R. S. Nascimento, P. J. Porfírio, J. Ricardo, A. Yu. Petrov
We verify the consistency of the G\"odel-type solutions within the four-dimensional Chern-Simons modified gravity with the non-dynamical Chern-Simons coefficient, for different forms of matter including dust, fluid, scalar field and electromagnetic f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50517501b0e41c8663136f3985ad2b71
We investigate (2+1)-dimensional gravity in a Weyl integrable spacetime (WIST). We show that, unlike general relativity, this scalar-tensor theory has a Newtonian limit for any dimension and that in three dimensions the congruence of world lines of p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0274a7306399062f6f173a3970d0518a
http://arxiv.org/abs/1503.04186
http://arxiv.org/abs/1503.04186
Autor:
M. J. Rebouças, J. B. Fonseca-Neto
Publikováno v:
General Relativity and Gravitation. 30:1301-1317
A class of Riemann-Cartan G\"odel-type space-times is examined by using the equivalence problem techniques, as formulated by Fonseca-Neto et al. and embodied in a suite of computer algebra programs called TCLASSI. A coordinate-invariant description o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b4f412abbe96d3c0324bdf0d2778eb0
https://doi.org/10.1023/a:1018842522782
https://doi.org/10.1023/a:1018842522782
Publikováno v:
Classical and Quantum Gravity. 15:1089-1101
A class of Riemann-Cartan G\"odel-type space-times are examined in the light of the equivalence problem techniques. The conditions for local space-time homogeneity are derived, generalizing previous works on Riemannian G\"odel-type space-times. The e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ed69ecddb0087a3259d5eea792586a7
https://doi.org/10.1088/0264-9381/15/4/026
https://doi.org/10.1088/0264-9381/15/4/026
As is well known, both Weyl and Weitzenb\"ock spacetimes were initially used as attempts to geometrize the electromagnetic field. In this letter, we prove that this field can also be regarded as a geometrical quantity in an extended version of the We
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d8a5f947ee7eba2eff93840aede0fdd3
Autor:
Carlos Romero, J. B. Fonseca-Neto
Publikováno v:
Particle Physics at the Tercentenary of Mikhail Lomonosov ISBN: 9789814436823
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1cbd11702d8377c475f7ebbfcf62ddcc
https://doi.org/10.1142/9789814436830_0088
https://doi.org/10.1142/9789814436830_0088
We reformulate the general theory of relativity in the language of Riemann-Cartan geometry. We start from the assumption that the space-time can be described as a non-Riemannian manifold, which, in addition to the metric field, is endowed with torsio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d2dd46494edcee705b0f621a810eeb6d
http://arxiv.org/abs/1211.1557
http://arxiv.org/abs/1211.1557
We show that the general theory of relativity can be formulated in the language of Weyl geometry. We develop the concept of Weyl frames and point out that the new mathematical formalism may lead to different pictures of the same gravitational phenome
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1865c0d72d72986f3f3aaf93f0a36066
http://arxiv.org/abs/1201.1469
http://arxiv.org/abs/1201.1469
We present the general theory of relativity in the language of a non-Riemannian geometry, namely, Weyl geometry. We show that the new mathematical formalism may lead to different pictures of the same gravitational phenomena, by making use of the conc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::03fa3575bd0f318a38283e66d18924bb
http://arxiv.org/abs/1106.5543
http://arxiv.org/abs/1106.5543