Author(s): Deven P. Carmichael and Martin Claassen Recent studies have revealed that the quantum geometry of electronic bands determines the electromagnetic properties of noninteracting insulators and semimetals. However, the role of quantum geometry in the optical responses of interacting electron systems remains largely unexplored. Here, we examin… [Phys. Rev. Lett. 137, 086503] Published Tue Aug 18, 2026