11 papers
On the possibility of torsion detection from neutrino cosmology and PMF
Garcia de Andrade
A cosmological neutrino sea model is used to place bounds on torsion and Lorentz violation and primordial magnetic fields. When one uses gravitational newtonian constant we…
Dynamo waves in Friedmann and Misner cosmologies
Garcia de Andrade
It is shown that Misner metric can be obtained as solution of dynamo waves equations and Friedmann hyperbolic metrics are obtained when the dynamo waves are absent. In the case of…
Slow decay of cosmic magnetic fields superadiabatically in curvature-torsion scales
L C Garcia de Andrade
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 …
Photon mass new limits from strong photon-torsion coupling generation of primordial magnetic fields
Garcia de Andrade
Recently Adelberger et al [Phys Rev Lett 98: 010402, (2007)] have placed a limit to photon mass by investigating the primordial magnetic fields. Earlier Bertolami et al [Phys Lett…
Decoupling between torsion and magnetic fields in bouncing cosmology and galactic dynamo seeds
Garcia de Andrade, Angel Ferrandez
Recently Salim et al [JCAP (2007)], have shown that galactic dynamo seeds can be possibly attainable in bouncing cosmological models with QED Lagrangeans. In this paper we generali…
Primordial magnetic fields of non-minimal photon-torsion axial coupling origin
Garcia de Andrade
Dynamo action is shown to be induced from homogeneous non-minimal photon-torsion axial coupling in the quantum electrodynamics (QED) framework in Riemann flat spacetime contortion…