Fabiana De Cesare -- Exploring confinement in Anti-de Sitter space

The first talk of the first hybrid event of the trimester on "New trends in QFT, modularity, resurgence" was held on November 20th, 2024. Started at 10:30 in IHES

Speaker: Fabiana De Cesare (Institut des Hautes Études Scientifiques, Bures-sur-Yvette, France.)
Abstract:
Anti-de Sitter space acts as an infra-red cutoff for asymptotically free theories, allowing interpolation between a weakly-coupled small-sized regime and a strongly-coupled flat-space regime. I will discuss this interpolation in the context of Yang-Mills theories in AdS from the perspective of boundary conformal theories and its implications for the confinement/deconfinement transition. We find indications that at the transition a singlet scalar operator becomes marginal, destabilizing the deconfined phase existing at a small size and leading to a confined phase that smoothly connects to flat space.