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arXiv · 2604.03185

One-point functions in 2D and 4D SUSY Janus

Andreas Karch·Ainesh Sanyal·Ryan C. Spieler·Mianqi Wang
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Abstract

We calculate the one-point functions of the marginal operator $\mathcal{L}'$ 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 $\mathcal{N}=0, 1, 2, 4$ holographic Janus interfaces in 4D SYM, and $\mathcal{N}=0, 4$ 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.

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Andreas Karch, Ainesh Sanyal, Ryan C. Spieler, Mianqi Wang. 2026-04-03. One-point functions in 2D and 4D SUSY Janus. https://arxiv.org/abs/2604.03185

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