Carrollian holographic duals are non-local

TL;DR

This paper demonstrates that in flat space gravity theories, the dual Carrollian boundary theory exhibits non-locality due to bulk interactions, impacting the understanding of holographic dualities.

Contribution

It establishes a connection between bulk interactions in flat space gravity and boundary non-locality in the Carrollian holographic dual.

Findings

Bulk interactions lead to boundary non-locality.

Carrollian duals of flat space gravity are inherently non-local.

Holographic mapping in flat space involves non-trivial boundary structures.

Abstract

Mapping the $S$-matrix of a generic theory of flat space gravity coupled to matter to correlation functions of a putative Carrollian dual, we show that bulk interactions imply boundary non-locality.