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Akademický článek
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Autor:
L. C. Garcia de Andrade
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 8, Pp 1-4 (2022)
Abstract We have recently shown that in Einstein–Cartan–Brans–Dicke (ECBD) gravity, torsion effects are not present in today’s universe because they are suppressed in a four-dimensional system, as in the bulk of five-dimensional braneworld en
Externí odkaz:
https://doaj.org/article/afbe9007fa7c4d38a22c995441e72ea7
Autor:
L. C. Garcia de Andrade
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 4, Pp 1-7 (2022)
Abstract Paul and SenGupta (Eur Phys J C 79:591, 2019) have recently shown that the reason why torsion effects are not present in today s universe is that they are suppressed in the bulk of a 5D braneworld. In this case only curvature effects remain.
Externí odkaz:
https://doaj.org/article/3227d71205984aabbd2c07ae8c4df6db
Autor:
de Andrade, L. C. Garcia
The purpose of this paper is twofold: First lending more support to torsion alternative gravity theories to General Relativity and cosmology and torsion detection by showing how they can simply used in the investigation of helicity and magnetic energ
Externí odkaz:
http://arxiv.org/abs/1612.05100
Akademický článek
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Autor:
de Andrade, L C Garcia
Earlier Bassett et al [Phys Rev D 63 (2001) 023506] investigated the amplification of large scale magnetic fields during preheating and inflation in several different models. They argued that in the presence of conductivity resonance effect is weaken
Externí odkaz:
http://arxiv.org/abs/1412.8248
Autor:
de Andrade, L C Garcia
Recently Barrow, and Tsagas [Phys Rev D 77: 107302, (2008)] have shown that slow decay of cosmological magnetic slowly decay in FRW universes on curvature scales as $B\sim{a^{-1}}$ in the context of general relativity (GR). This helps possible amplif
Externí odkaz:
http://arxiv.org/abs/1401.6250
Autor:
de Andrade, L. C. Garcia
Earlier Enqvist and Olesen have shown that formation of ferromagnetic planar walls in vacuum at GUT scales in comoving plasmas may generate a large scale magnetic field of $B_{now}\simeq{10^{-14}G}$. In this paper we show that starting from classical
Externí odkaz:
http://arxiv.org/abs/1401.2587
Autor:
L. C. Garcia de Andrade
Publikováno v:
Universe, Vol 8, Iss 12, p 658 (2022)
Spacetime torsion is known to be highly suppressed at the end of inflation, which is called preheating. This result was recently shown in (EPJ C (2022)) in the frame of Einstein–Cartan–Brans–Dicke inflation. In this paper, it is shown that a to
Externí odkaz:
https://doaj.org/article/c672afde9f5c43ab8a7e51da95f0920f
Autor:
de Andrade, L C Garcia
Resonant amplification of magnetic fields in spacetimes with torsion are investigated by solving the Heisenberg-Ivanenko nonlinear spinor equation. It is shown that torsion is helicity dependent and that the magnetic fields can be resonantly amplifie
Externí odkaz:
http://arxiv.org/abs/1211.4734