Open Worldsheets for Holographic Interfaces

Type IIB supergravity admits Janus and multi-Janus solutions with eight unbroken supersymmetries that are locally asymptotic to AdS3 × S3 ×M4 (where M4 is either T 4 or K3). These solutions are dual to two or more CFTs defined on half-planes which share a common line interface. Their geometry consists of an AdS2×S2×M4 fibration over a simply connected Riemann surface Σ with boundary. In the present paper, we show that regular exact solutions exist also for surfaces Σ which are not simply connected. Specifically, we construct in detail solutions for which Σ has the topology of an annulus. This construction is generalized to produce solutions for any surface Σ with the topology of an open string worldsheet with g holes