2k citations · 12k across the 281 of their papers we have counts for
9 papers · 1 filter
Generalized Chaplygin gas and CMBR constraints
M. C. Bento, O. Bertolami, A. A. Sen
We study the dependence of the location of the Cosmic Microwave Background Radiation (CMBR) peaks on the parameters of the generalized Chaplygin gas model, whose equation of state…
Generalized Chaplygin gas as a scheme for Unification of Dark Energy and Dark Matter
M. C. Bento, O. Bertolami, A. A. Sen
We study the cosmological scenario arising from the dynamics of a generalized Chaplygin gas. The equation of state of the system is given in terms of the energy density, , and p…
Tachyonic Inflation in the Braneworld Scenario
M. C. Bento, O. Bertolami, A. A. Sen
We consider cosmological inflation driven by the rolling tachyon in the context of the braneworld scenario. We show that sufficient inflation consistent with the observational cons…
Hypothetical Gravity Control and Implications for Spacecraft Propulsion
O. Bertolami, M. Tajmar
A scientific analysis of the conditions under which gravity could be controlled and the implications that an hypothetical manipulation of gravity would have for known schemes of sp…
Noncommutative Scalar Field Coupled to Gravity
O. Bertolami, L. Guisado
A model for a noncommutative scalar field coupled to gravity is proposed via an extension of the Moyal product. It is shown that there are solutions compatible with homogeneity and…
Topological Defect Densities in Type-I Superconducting Phase Transitions
J. Páramos, O. Bertolami, T. A. Girard +1
We examine the consequences of a cubic term addition to the mean-field potential of Ginzburg-Landau theory to describe first order superconductive phase transitions. Constraints on…