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5 papers · 1 filter
On the cosmological effects of the Weyssenhoff spinning fluid in the Einstein-Cartan framework
G. de Berredo-Peixoto, E. A. de Freitas
The effects of non-Riemannian structures in Cosmology have been studied long ago and are still a relevant subject of investigation. In the seventies, it was discovered that singula…
Exact Foldy-Wouthuysen transformation for gravitational waves and magnetic field background
Bruno Goncalves, Yuri N. Obukhov, Ilya L. Shapiro
We consider an exact Foldy-Wouthuysen transformation for the Dirac spinor field on the combined background of a gravitational wave and constant uniform magnetic field. By taking th…
Inside the BTZ black hole
G. de Berredo-Peixoto, M. O. Katanaev
We consider static circularly symmetric solution of three-dimensional Einstein's equations with negative cosmological constant (the BTZ black hole). The case of zero cosmological c…
Cosmological Constant Problems and Renormalization Group
Ilya L. Shapiro, Joan Sola
The Cosmological Constant Problem emerges when Quantum Field Theory is applied to the gravitational theory, due to the enormous magnitude of the induced energy of the vacuum. The u…
The de Broglie-Bohm Interpretation of Evaporating Black-Holes
J. Acacio de Barros, G. Oliveira-Neto, T. B. Vale
In this work we apply the de Broglie-Bohm interpretation of quantum mechanics to the quantized spherically symmetric black-hole coupled to a massless scalar field. The wave-functio…