3 papers
hep-th2026
Challenges to Understanding Celestial Holography from the Bottom Up
Adam Tropper
In the bottom-up approach to celestial holography, it is tempting to define celestial amplitudes by transforming momentum-space amplitudes order by order in perturbation theory. We…
hep-th2025
Symmetries of the Celestial Supersphere
Adam Tropper
We study the celestial CFT dual to theories with bulk supersymmetry. The boundary theory realizes supersymmetry in the spirit of the Green-Schwarz superstring: there is manifest 4d…
hep-th2025
Supersymmetric Soft Theorems
Adam Tropper
We show that in supersymmetric theories, knowing the soft theorem for a single particle in a supermultiplet allows one to immediately determine soft theorems for the remainder of t…