AdS${}_3$ solutions in massive IIA, defect CFTs and T-duality

Abstract

We establish a map between AdS${}_3\times$S${}^2$ and AdS${}_7$ solutions to massive IIA supergravity that allows one to interpret the former as holographic duals to D2-D4 defects inside 6d (1,0) CFTs. This relation singles out in a particular manner the AdS${}_3\times$S${}^2$ solution constructed from AdS${}_3\times$S${}^3\times$CY${}_2$ through non-Abelian T-duality, with respect to a freely acting SU(2). We find explicit global completions to this solution and provide well-defined (0,4) 2d dual CFTs associated to them. These completions consist of linear quivers with colour groups coming from D2 and D6 branes and flavour groups coming from D8 and D4 branes. Finally, we discuss the relation with flows interpolating between AdS${}_3\times$S${}^2\times$T${}^4$ geometries and AdS${}_7$ solutions found in the literature.

arXiv commentv2: Minor improvements to content and format - version accepted by JHEP: 29 pages + Appendices

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