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Consistency and generalised tests in extended theories of gravity

Álvaro de la Cruz-Dombriz
Complutense U. of Madrid and ACGC - U. of Cape Town

First we shall discuss the consistency of general classes of extended theories of gravity with non-minimal couplings governed by the contraction of the Ricci tensor with the energy-momentum tensor. We provide a general framework and show that the conformal and non-minimal couplings to the matter fields usually lead to higher-order equations of motion and put severe constraints whenever the fluids are represented, for instance, by either a canonical scalar field or a massive vector field. Then we shall illustrate the recent line of research in order to study CMB perturbations in the frame of modified gravity theories illustrating the procedure for a general class of f(R) theories.

2015 April 16, 14:00

Faculdade de Ciências da Universidade de Lisboa (C6.2.51)
Campo Grande, 1749-016 Lisboa

Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia