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6 papers · 2 filters
Brane Lorentz Symmetry from Lorentz Breaking in the Bulk
O. Bertolami, C. Carvalho
We propose the mechanism of spontaneous symmetry breaking of a bulk vector field as a way to generate the selection of bulk dimensions invisible to the standard model confined to t…
Lorentz Symmetry Derived from Lorentz Violation in the Bulk
Orfeu Bertolami, Carla Carvalho
We consider bulk fields coupled to the graviton in a Lorentz violating fashion. We expect that the overly tested Lorentz symmetry might set constraints on the induced Lorentz viola…
Berry Phase in the Gravitational Quantum Well and the Seiberg-Witten map
C. Bastos, O. Bertolami
We explicitly compute the geometrical Berry phase for the noncommutative gravitational quantum well for different SW maps. We find that they lead to different partial contributions…
Quantum gravitational decoherence of matter waves
Charles H. -T. Wang, Robert Bingham, J. Tito Mendonca
One of the biggest unsolved problems in physics is the unification of quantum mechanics and general relativity. The lack of experimental guidance has made the issue extremely evasi…
The flight of the bumblebee: solutions from a vector-induced spontaneous Lorentz symmetry breaking model
Orfeu Bertolami, Jorge Paramos
The vacuum solutions arising from a spontaneous breaking of Lorentz symmetry due to the acquisition of a vacuum expectation value by a vector field are derived. These include the p…
General Theory of Relativity: Will it survive the next decade?
Orfeu Bertolami, Jorge Paramos, Slava G. Turyshev
The nature of gravity is fundamental to our understanding of our own solar system, the galaxy and the structure and evolution of the Universe. Einstein's general theory of relativi…