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Modified Friedmann Equation from Nonminimally Coupled Theories of Gravity
Orfeu Bertolami, Jorge Páramos
In this work we study how nonminimally coupled theories of gravity modify the usual Friedmann equation, and develop two methods to treat these. The ambiguity in the form of the Lag…
Robertson-Schroedinger type formulation of Ozawa's noise-disturbance uncertainty principle
Catarina Bastos, Alex E. Bernardini, Orfeu Bertolami +2
In this work we derive a matrix formulation of a noise-disturbance uncertainty relation, which is akin to the Robertson-Schrödinger uncertainty principle. Our inequality is stronge…
Minimal extension of General Relativity: alternative gravity model with non-minimal coupling between matter and curvature
Orfeu Bertolami, Jorge Páramos
We examine an extension of General Relativity with an explicit non-minimal coupling between matter and curvature. The purpose of this work is to present an overview of the implicat…
Solar System constraints to nonminimally coupled gravity
Orfeu Bertolami, Riccardo March, Jorge Páramos
We extend the analysis of Chiba, Smith and Erickcek \cite{CSE} of Solar System constraints on gravity to a class of nonminimally coupled (NMC) theories of gravity. These gen…
Homogeneous spherically symmetric bodies with a nonminimal coupling between curvature and matter: the choice of the Lagrangian density for matter
Orfeu Bertolami, Jorge Páramos
In this work we study how a nonminimal coupling between matter and gravity can modify the structure of a homogeneous spherical body. The physical relevance of the adopted Lagrangia…
Entanglement due to noncommutativity in the phase-space
Catarina Bastos, Alex E. Bernardini, Orfeu Bertolami +2
The entanglement criterion for continuous variable systems and the conditions under which the uncertainty relations are fulfilled are generalized to the case of a noncommutative (N…