Entanglement of purification and multiboundary wormhole geometries

Abstract

We posit a geometrical description of the entanglement of purification for sub-regions in a holographic CFT. The bulk description naturally generalizes the two-party case and leads to interesting inequalities among multi-party entanglements of purification that can be geometrically proven from the conjecture. Further, we study the relationship between holographic entanglements of purification in locally-AdS 3 spacetimes and entanglement entropies in multi-throated wormhole geometries constructed via quotienting by isometries. In particular, we derive new holographic inequalities for geometries that are locally AdS 3 relating entanglements of purification for subregions and entanglement entropies in the wormhole geometries.