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Half-BPS Wilson loop and AdS2/CFT1

Author(s): Giombi, Simone; Roiban, Radu; Tseytlin, Arkady A

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Abstract: We study correlation functions of local operator insertions on the 1/2-BPS Wilson line in N = 4 super Yang–Mills theory. These correlation functions are constrained by the 1d superconformal symmetry pre- served by the 1/2-BPS Wilson line and define a defect CFT1 living on the line. At strong coupling, a set of elementary operator insertions with protected scaling dimensions correspond to fluctuations of the dual fundamental string in AdS5 × S5 ending on the line at the boundary and can be thought of as light fields propagating on the AdS2 worldsheet. We use AdS/CFT techniques to compute the tree-level AdS2 Witten diagrams describing the strong coupling limit of the four-point functions of the dual operator insertions. Using the OPE, we also extract the leading strong coupling corrections to the anomalous dimensions of the “two-particle” operators built out of elementary excitations. In the case of the circular Wilson loop, we match our results for the 4-point functions of a special type of scalar insertions to the prediction of localization to 2d Yang–Mills theory.
Publication Date:  20
Electronic Publication Date:  20
Citation: Giombi, Simone, Roiban, Radu, Tseytlin, Arkady A. (2017). Half-BPS Wilson loop and AdS2/CFT1. Nuclear Physics B, 922 (499 - 527. doi:10.1016/j.nuclphysb.2017.07.004
DOI: doi:10.1016/j.nuclphysb.2017.07.004
ISSN: 0550-3213
Pages: 499 - 527
Language: en
Type of Material: Journal Article
Journal/Proceeding Title: Nuclear Physics B
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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