Speaker: Roman Stemplowski (HU Berlin)

Title: QFT in AdS at 1 loop

Abstract:
I study QFT in AdS at loop level. I focus on a particular AdS2 theory originating from a string worldsheet in AdS5xS5. This string is the holographic dual of a SUSY Wilson Loop in N=4 SYM. Through holography, some observables are known exactly in coupling and can be used to check any perturbative computations. Using this as a controlled environment, I address a technical gap in AdS loop perturbation theory for models with derivative interactions. Concretely, using some version of dimensional regularisation compatible with SUSY, I recover the NLO of some boundary observable called « Bremsstrahlung function ». Along the way, we clarify the holographic dictionary for defect CFTs.