G. Ribeiro
Sao Paulo State University
7 Papers
51 Citations
G. Ribeiro is an academic researcher from Sao Paulo State University. The author has contributed to research in topics: Metric expansion of space & Wormhole. The author has an hindex of 5, co-authored 7 publications.
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Papers
Phantom fluid supporting traversable wormholes in alternative gravity with extra material terms
TL;DR: In this paper, the authors propose the modelling of wormholes within an alternative gravity theory that proposes an extra material (rather than geometrical) term in its gravitational action, which yields the wormholes to be filled by a phantom fluid, that is, a fluid with equation of state parameter $\omega<-1$.
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Phantom fluid supporting traversable wormholes in alternative gravity with extra material terms
TL;DR: Wormholes are tunnels connecting different regions in spacetime and they were obtained originally as a solution for Einstein's General Relativity theory and according to this theory, they need to be f...
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A cosmological scenario from the Starobinsky model within the $f(R,T)$ formalism
Pedro H. R. S. Moraes,Pedro H. R. S. Moraes,P. K. Sahoo,G. Ribeiro,R. A. C. Correa,R. A. C. Correa +5 more
TL;DR: In this paper, a cosmological model from the theory of gravitation was derived, for which the Ricci scalar and the trace of the energy-momentum tensor were used to predict both the decelerated and the accelerated regimes of expansion.
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Wormholes in Randall-Sundrum braneworld
TL;DR: This work will construct Randall-Sundrum II braneworld wormholes whose interior space-time admits conformal motion and shows that for a wide range of positive values of the brane tension, it is possible to fill this wormholes with non-exotic matter, departing from an important theoretical shortcoming of General Relativity wormholes.
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A transition from a decelerated to an accelerated phase of the universe expansion from the simplest non-trivial polynomial function of T in the f(R,T) formalism
TL;DR: In this paper, the authors present cosmological solutions from the simplest non-trivial polynomial function of the Ricci scalar and trace of the energy-momentum tensor in the theory of gravity to predict a transition from a decelerated to an accelerated expansion of the universe.