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Supernovae constraints on dark energy and modified gravity models
M. C. Bento, O. Bertolami, N. M. C. Santos +1
We use the Type Ia Supernova gold sample to constrain the parameters of dark energy models namely the Cardassian, Dvali-Turner (DT) and generalized Chaplygin gas (GCG) models. In o…
Generalized Chaplygin gas model, supernovae and cosmic topology
M. C. Bento, O. Bertolami, M. J. Rebouças +1
In this work we study to which extent the knowledge of spatial topology may place constraints on the parameters of the generalized Chaplygin gas (GCG) model for unification of dark…
Scaling of variables and the relation between noncommutative parameters in Noncommutative Quantum Mechanics
O. Bertolami, J. G. Rosa, C. M. L. de Aragão +2
We consider Noncommutative Quantum Mechanics with phase space noncommutativity. In particular, we show that a scaling of variables leaves the noncommutative algebra invariant, so t…
The Chaplygin dark star
O. Bertolami, J. Paramos
We study the general properties of a spherically symmetric body described through the generalized Chaplygin equation of state. We conclude that such object, dubbed generalized Chap…
Quantum and Classical divide: the gravitational case
O. Bertolami, J. G. Rosa
We study the transition between quantum and classical behavior of particles in a gravitational quantum well. We analyze how an increase in the particles mass turns the energy spect…
Fundamental Physics with the Laser Astrometric Test Of Relativity
LATOR Collaboration, S. G. Turyshev, H. Dittus +37
The Laser Astrometric Test Of Relativity (LATOR) is a joint European-U.S. Michelson-Morley-type experiment designed to test the pure tensor metric nature of gravitation - a fundame…