Centre de Physique Théorique


Lundi 23 octobre 2017

11h00 – 13h00, Amphi 5 du CPT

On the road to covariant statistical mechanics

Thibaut Josset

Soutenance de thèse de Thibaut Josset.

14h00 – 16h00, Amphi 5 du CPT

Geometry transition in covariant loop quantum gravity

Marios Christodoulou

Soutenance de thèse de Marios Christodoulou

15h00 – 16h00, Amphi 4 du CPT (4eme étage)

Towards new constraints in alternative theories of gravity : cosmography, extended g-evolution, neutron stars and gravitational waves

Alvaro de la Cruz-Dombriz (Gravity & Cosmology Group, University of Cape Town)

Model-independent methods in cosmology, N-body simulations and theoretical predictions in strong-gravity regimes have become essential tool in order to deal with an increasing number of theoretical alternatives for explaining several open issues in the cosmic history. In principle, this provides a way of testing the ΛCDM cosmological paradigm under different assumptions and to rule out whole classes of competing theories. In this talk I will present some of the latest progress and shortcomings in the cosmographic approaches for several modified gravity theories using supernovae catalogues, baryonic acoustic oscillation data and H(z) differential age compilations. I will also sketch a recent line of full N-body simulation technique modifying g-evolution to accommodate effects from higher-order theories and finally, I will provide a flavour on the phenomenology of neutron stars and gravitational waves constraints once the Einsteinian paradigm is abandoned.