Perex
In this talk I will discuss the potentialities of future ground-based millimeter-wavelength line intensity mapping for constraining the properties of gravity at cosmological scales. I shall first introduce line intensity mapping experiments, focusing on their key properties and differences with respect to galaxy surveys. I will describe the main reasons to consider alternative theories of gravity. I will concentrate on the properties of the theories that have been tested in arXiv:2304.08471. Finally, I will present and discuss the results obtained.