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Résumé |
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. |
