Notes on a surface defect in the \(O(N)\) model
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Publication:6119989
DOI10.1007/JHEP12(2023)004arXiv2305.11402MaRDI QIDQ6119989
Author name not available (Why is that?)
Publication date: 20 February 2024
Published in: (Search for Journal in Brave)
Abstract: We study a surface defect in the free and critical vector models, defined by adding a quadratic perturbation localized on a two-dimensional subspace of the -dimensional CFT. We compute the beta function for the corresponding defect renormalization group (RG) flow, and provide evidence that at long distances the system flows to a nontrivial defect conformal field theory (DCFT). We use epsilon and large expansions to compute several physical quantities in the DCFT, finding agreement across different expansion methods. We also compute the defect free energy, and check consistency with the so-called -theorem for RG flows on surface defects.
Full work available at URL: https://arxiv.org/abs/2305.11402
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