MPP Colloquium

Modifying Gravity at Low Redshift

by Philippe Brax (IPhT Saclay)

→ Europe/Berlin
Max-Planck-Institut für Physik, Auditorium

Max-Planck-Institut für Physik, Auditorium

Description
After reviewing some of the constraints on possible modifications of gravity coming from laboratory and solar tests, I will present modified gravity models on large scales. In particular, I will focus on the DGP and chameleon-f(R) models. In both cases local tests are evaded thanks to non linear mechanisms: the Vainshtein effect for DGP and the thin shell phenomenon for chameleons. Eventually, I will present new results on modifying gravity with a dilaton in the strong string coupling regime.