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  • Open Access

Carrollian amplitudes and holographic correlators in AdS3/CFT2

Iustin Surubaru* and Bin Zhu†

  • School of Mathematics and Maxwell Institute for Mathematical Sciences, University of Edinburgh, EH9 3FD Edinburgh, United Kingdom

  • *Contact author: iustin.surubaru@ed.ac.uk
  • †Contact author: bzhu@ed.ac.uk
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Phys. Rev. D 112, 026023 – Published 21 July, 2025

DOI: https://doi.org/10.1103/7t4n-7c6j

Abstract

We study Carrollian amplitudes of massless scalars in (1+2) Minkowski space. Using the prescription recently shown by Alday et al. [Carrollian amplitudes from holographic correlators, J. High Energy Phys. 03 (2025) 158] originally designed for the AdS4 Witten diagrams, we show that AdS3 Witten diagrams in position space in the flat space limit reduce to Carrollian amplitudes. The flat space limit in the bulk is implemented by the Carrollian limit at the boundary. Focusing on four-point correlators with contact and exchange diagrams, we show that the Carrollian limit makes the universality of the bulk point singularity manifest upon performing analytic continuation to the Lorentzian signature of the boundary correlators. Unlike four-point Carrollian amplitudes in (1+3) dimensions, the (1+2) dimensional ones are nondistributional, having analytic properties simpler than the AdS correlators. We also observe for the first time a double copy structure of Carrollian amplitudes.

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Phys. Rev. D 112, 026023– Published 21 July, 2025
  • Received 23 April 2025
  • Accepted 5 July 2025
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