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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 one-point functions of the marginal operators dual to the space-varying dilaton in 4D and 2D holographic Janus interfaces, extending the results of \cite{Clark_2005}. We compare the strongly coupled supergravity and weakly coupled CFT limits for $\mathcal{N}=0,1,2,4$ Janus interfaces in 4D $\mathcal{N}=4$ SYM and for non-supersymmetric and half-BPS Janus interfaces in the 2D D1--D5 CFT. In 4D, the $\mathcal{N}=0,1$ results agree only to first order in the jump parameter, and the $\mathcal{N}=2,4$ result agrees exactly. In 2D, exact agreement holds for the half-BPS interface, whereas the non-supersymmetric interface agrees only to first order.

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Andreas Karch, Ainesh Sanyal, Ryan C. Spieler, Mianqi Wang. 2026-09-21. One-point functions in 2D and 4D SUSY Janus. https://arxiv.org/abs/2604.03185

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