Lectures on Screened Modified Gravity

Abstract

The acceleration of the expansion of the Universe has led to the construction of Dark Energy models where a light scalar field may have a range reaching up to cosmological scales. Screening mechanisms allow these models to evade the tight gravitational tests in the solar system and the laboratory. I will briefly review some of the salient features of screened modified gravity models of the chameleon, dilaton or symmetron types using $f(R)$ gravity as a template.

Comments: 22 pages, based on lectures given at the Cracow School of Theoretical Physics, Zakopane, Poland, May 2012: "Astroparticle Physics in the LHC Era"