June 7, 10:15 in E204 (Tuesday Seminar)   

Juan Garcia-Bellido (UAM Madrid, Spain)


The growth factor as a key observable for exploring the nature of dark energy

While background observables like the rate of expansion and the matter content give us crucial information on the nature of dark energy, it is the growth of matter perturbations that will be able to break degeneracies among the different alternatives: quintessence, modified gravity, extra dimensions or even local curvature. Future surveys like the Dark Energy Survey and Euclid will be able to chart the Universe out to redshift z ~ 2, and allow us to disentangle the various alternatives.