Explaining the physical origin of cosmic acceleration still poses a challenge to modern cosmology. On one hand, observational evidence corroborating this phenomenon is compelling and continuously becoming stronger and stronger. On the other hand a physical explanation for it is still missing.
To address this issue many models have been proposed and testing their phenomenology against the growing amount of precise cosmological data has become a challenge. In this thesis we develop the efficient, high performance, computational tools to do that. We implement the Effective Field Theory approach to cosmic acceleration in the public Einstein-Boltzmann solver CAMB and we dub the resulting code EFTCAMB.
We discuss its architecture and performances and overall we show that, in its present version, EFTCAMB stands as a powerful and versatile tool that can be used to study both model independent and model dependent approaches to the problem of cosmic acceleration.