General Relativity (GR) perfectly describes a variety of phenomena in gravity at energy scales much less than the Planck mass. However, this theory calls for an ultraviolet (UV) completion at higher energies.
Various approaches have been developed in this direction in the past decades, including (but not limited to) string theory, which naturally contains the limit of GR. The low-energy effective field theory (EFT) of GR can also have a UV completion which is formulated as a field theory, perturbatively including higher curvature operators or non- perturbatively with an asymptotically safe fixed point. Formulation of new methods, especially working for gravity in the non-perturbative regime, requires more exchanges between the scientific communities that used to be separated. We believe that cross-team discussions will lead to significant progress in understanding the self-consistency and potential phenomenological implications of UV complete descriptions of gravity.
The goal of the workshop is to bring together the experts working on different UV complete approaches to quantum gravity, from string theory to various perturbative and non-perturbative approaches. Given the promising opportunity to probe quantum gravity effects in the very early Universe with future CMB and gravitational wave experiments, we expect the in-depth discussions on predictions and self-consistency of low- energy effective theories on top of cosmological backgrounds.
The meeting will be mainly focused on the following directions:
- Non-perturbative methods, in application to quantum gravity, such as string theory, amplitudes bootstrap, functional renormalisation group, loop quantum gravity, etc.
- Quantum gravity effects in the early Universe: inflation, cosmological correlators, non-gaussianities, gravitational waves.
- EFT of gravity in connection with cosmology and Black Holes.
- other related topics.