The universal swampland

          @misc{ pirsa_PIRSA:25030063,
            doi = {10.48660/25030063},
            url = {https://pirsa.org/25030063},
            author = {Eichhorn, Astrid},
            keywords = {Quantum Gravity},
            language = {en},
            title = {The universal swampland},
            publisher = {Perimeter Institute},
            year = {2025},
            month = {mar},
            note = {PIRSA:25030063 see, \url{https://pirsa.org}}
          }
          

Abstract

The swampland is the space of those effective field theories that cannot be ultraviolet completed in quantum gravity. Understanding the swampland is relevant for phenomenological model-building and for observational tests of quantum gravity. This talk will have three parts: First, I will introduce the notion relative swamplands, to distinguish the swamplands of different quantum-gravity approaches. Their intersection forms the absolute swampland. Second, I will discuss a subset of swampland conjectures in the light of asymptotically safe gravity. Third, I will explain how asymptotic safety can provide a mechanism to generate universality, when it is realized within an intermediate regime between a non-quantum-field-theoretic quantum regime of gravity and the standard effective field theory regime below the Planck scale.