One-point functions in 2D and 4D SUSY Janus
High Energy Physics - Theory
2026-04-06 v1
Abstract
We calculate the one-point functions of the marginal operator dual to the space-varying dilaton in 4D and 2D holographic Janus interfaces, extending results in arXiv:hep-th/0407073. We compare strongly-coupled supergravity and weakly-coupled CFT limits across holographic Janus interfaces in 4D SYM, and Janus interfaces for 2D D1-D5 CFT. Exact agreement between these regimes occurs only for the half-BPS interfaces in both 4D and 2D cases, while for other interfaces they agree to first order of the jump parameter. This result reinforces that exact weak/strong coupling matching for interface observables on supersymmetric (SUSY) conformal manifolds is exclusive to maximally SUSY interfaces.
Cite
@article{arxiv.2604.03185,
title = {One-point functions in 2D and 4D SUSY Janus},
author = {Andreas Karch and Ainesh Sanyal and Ryan C. Spieler and Mianqi Wang},
journal= {arXiv preprint arXiv:2604.03185},
year = {2026}
}