Is Cosmic Acceleration a Symptom of the Breakdown of General Relativity?

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Abstract
If general relativity is the correct theory of physics on large scales, then there is a differential equation that relates the Hubble expansion function, inferred from measurements of angular diameter distance and luminosity distance, to the growth rate of large scale structure. Deviations from this consistency relationship could be the signature of the breakdown of general relativity on cosmological scales. As an example, we consider a universe described by a recently proposed 5-dimensional modified gravity theory. We demonstrate that this leads to an inconsistency within the dark energy parameter space. We propose a procedure to detect this signature of modified gravity theory using different combinations of cosmological probes.

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