PIRSA:25090056

Video URL

https://pirsa.org/25090056

The Flat Limit of AdS Coupled to a Bath

Neuenfeld, D. (2025). The Flat Limit of AdS Coupled to a Bath. Perimeter Institute for Theoretical Physics. https://pirsa.org/25090056

Neuenfeld, Dominik. The Flat Limit of AdS Coupled to a Bath. Perimeter Institute for Theoretical Physics, Sep. 30, 2025, https://pirsa.org/25090056 

          @misc{ scivideos_PIRSA:25090056,
            doi = {10.48660/25090056},
            url = {https://pirsa.org/25090056},
            author = {Neuenfeld, Dominik},
            keywords = {Quantum Fields and Strings},
            language = {en},
            title = {The Flat Limit of AdS Coupled to a Bath},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2025},
            month = {sep},
            note = {PIRSA:25090056 see, \url{https://scivideos.org/index.php/pirsa/25090056}}
          }

Dominik Neuenfeld University of Würzburg

Talk numberPIRSA:25090056
DOI10.48660/25090056
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

 In this talk I'll explain how to take a well-defined flat-space limit of brane models of AdS coupled to a non-gravitating bath. In the dual BCFT this amounts to a triple-scaling limit where both the number of boundary degrees of freedom and the boundary coupling are taken to infinity while the BCFT boundary piecewise approaches a lightcone. The resulting construction offers a new approach to study the relation between the flat limit of AdS and Carrollian/Celestial CFT, as well as the potential to carry over ideas from AdS/CFT to flat space. I will discuss some implications for entanglement entropy in flat space, in particular the fact that two different notions of entanglement entropy arise on scri, depending on whether one traces out modes which have left through scri.