Realize PPEFT-inferred source properties in microscopic string constructions

Construct explicit microscopic string configurations (for example, D-brane and orientifold setups) that realize the brane-like sources with the properties inferred via point-particle effective field theory and thereby source the four-dimensional de Sitter geometries found in six-dimensional gauged chiral supergravity.

Background

Using PPEFT, the authors relate near-source asymptotics of bulk fields to properties of the sources, obtaining constraints any candidate stringy source must satisfy to produce the desired 4D de Sitter backgrounds.

While this efficiently characterizes required source behavior, it remains open whether known stringy constituents can realize these properties, thus motivating a search for explicit microscopic constructions consistent with the PPEFT boundary conditions.