The current standard cosmological model is constructed within the framework of general
relativity with a cosmological constant Λ, which is often associated with dark energy, and …

The gravitational growth index formalism provides a model independent way to look for
deviations from general relativity by testing dark energy physics distinct from its effects on …

Cosmological observations are beginning to reach a level of precision that allows us to test
some of the most fundamental assumptions in our working model of the Universe. One such …

Next generation surveys will observe the large-scale structure of the Universe with
unprecedented accuracy. This will enable us to test the relationships between matter over …

The testing of general relativity at cosmological scales has become a possible and timely
endeavor that is not only motivated by the pressing question of cosmic acceleration but also …

Dark energy and modified gravity models can produce similar expansion histories for the
Universe, which can be derived from the Hubble parameter measured, for example, using …

In “modified” gravity the observed acceleration of the universe is explained by changing the
gravitational force law or the number of degrees of freedom in the gravitational sector. Both …

In alternative theories of gravity, designed to produce cosmic acceleration at the current
epoch, the growth of large scale structure can be modified. We study the potential of …

The growth rate of the large-scale structure of the Universe has been advocated as the
observable par excellence for testing gravity on cosmological scales. By considering linear …

We construct a consistency test of General Relativity (GR) on cosmological scales. This test
enables us to distinguish between the two alternatives to explain the late-time accelerated …