I am working on the interplay between various non-perturbative approaches to quantum gravity, which often involve some form of discrete structures, and cosmological models which could relate to observation. In this context I have been recently involved in the formulation of a "group field cosmology" model which provides a mechanism for topology change and for the creation of inhomogeneities starting from homogeneous and isotropic loop quantum cosmology.
Another recent interest of mine has been the formulation of classical gravity as a Cartan geometry, which allows bringing `spontaneous' symmetry breaking into gravity. This could be used for a reformulation of Ashtekar variables where local Lorentz symmetry is broken to a rotational subgroup through local observers that specify a local notion of `time'. I am currently working on formulations of physics on `observer space' which include all such local observers simultaneously. In general relativity this space is just a direct product of spacetime with the space of unit timelike vectors at each point, but if proposals such as relative locality point in the right direction it could be a more general space. Observer space could also be helpful to understand Lorentz-violating theories from a new geometric angle.