PIRSA:26040085

Maximally heavy dynamics in the causal diamond

Rogelberg, G. (2026). Maximally heavy dynamics in the causal diamond. Perimeter Institute. https://pirsa.org/26040085

Rogelberg, Gordon. Maximally heavy dynamics in the causal diamond. Perimeter Institute, Apr. 07, 2026, https://pirsa.org/26040085 

          @misc{ pirsa_PIRSA:26040085,
            doi = {10.48660/26040085},
            url = {https://pirsa.org/26040085},
            author = {Rogelberg, Gordon},
            keywords = {Quantum Fields and Strings},
            language = {en},
            title = {Maximally heavy dynamics in the causal diamond},
            publisher = {Perimeter Institute},
            year = {2026},
            month = {apr},
            note = {PIRSA:26040085 see, \url{https://pirsa.org}}
          }

Gordon Rogelberg Yale University

Talk numberPIRSA:26040085
DOI10.48660/26040085
Collection
Talk Type Scientific Series
Subject

Abstract

I'll discuss four-point functions of CFT operators with infinite scaling dimension, which arise ubiquitously in both holographic and non-holographic CFTs in general dimension, as well as in the flat space limit of rigid QFTs on AdS. The space of these correlators is poorly understood, due to both their computational complexity and inaccessibility through standard bootstrap techniques. To navigate these challenges, I'll introduce a rigorous framework for extracting well-defined ``maximally heavy observables,'' which are analogous to intrinsic quantities describing statistical systems in the thermodynamic limit. These observables are highly constrained by crossing symmetry and unitarity, and shed light on the emergence of bulk locality through dynamical phase transitions. I'll relate this framework to torus partition functions at large central charge, and work out illustrative examples in generalized free theories and the four-point function of maximal giant gravitons in planar $\mathcal{N}=4$ SYM.