PIRSA:25010071

Area metrics: Modified gravity from quantum gravity

Borissova, J. (2025). Area metrics: Modified gravity from quantum gravity. Perimeter Institute. https://pirsa.org/25010071

Borissova, Johanna. Area metrics: Modified gravity from quantum gravity. Perimeter Institute, Jan. 06, 2025, https://pirsa.org/25010071 

          @misc{ pirsa_PIRSA:25010071,
            doi = {10.48660/25010071},
            url = {https://pirsa.org/25010071},
            author = {Borissova, Johanna},
            keywords = {Other},
            language = {en},
            title = {Area metrics: Modified gravity from quantum gravity},
            publisher = {Perimeter Institute},
            year = {2025},
            month = {jan},
            note = {PIRSA:25010071 see, \url{https://pirsa.org}}
          }

Johanna Borissova

Perimeter Institute

Talk number
PIRSA:25010071
Collection
Talk Type
Subject
Abstract

Area metrics define generalized geometric backgrounds to describe spacetime. They are suggested at various places in classical field theory and arise within different approaches to quantum gravity. On these grounds, after introducing the notion of an area metric, I will consider covariant area-metric actions to second order in fluctuations and derivatives. I will then show how these give rise to effective length-metric actions with a distinct nonlocal Weyl-curvature squared term beyond general relativity. Finally, I will point out possible implications and routes for phenomenology.