Abstract
This paper investigates scalar perturbations in the top-down supersymmetric Janus solutions dual to conformal interfaces in the D1/D5 CFT, finding analytic closed-form solutions. We obtain an explicit representation of the bulk-to-bulk propagator and extract the two-point correlation function of the dual operator with itself, whose form is not fixed by symmetry alone. We give an expression involving the sum of conformal blocks associated with the bulk-defect operator product expansion and briefly discuss finite-temperature extensions. To our knowledge, this is the first computation of a two-point function which is not completely determined by symmetry for a fully-backreacted, top-down holographic defect.
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Chiodaroli, M., Estes, J. & Korovin, Y. Holographic two-point functions for Janus interfaces in the D1/D5 CFT. J. High Energ. Phys. 2017, 145 (2017). https://doi.org/10.1007/JHEP04(2017)145
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DOI: https://doi.org/10.1007/JHEP04(2017)145