Identify the microscopic nature of the brane-like sources

Ascertain whether the brane-like sources responsible for the codimension-two singularities in the 6D gauged chiral supergravity de Sitter compactifications can be identified with known string-theoretic objects, such as D-branes or orientifold planes, and characterize their microscopic properties.

Background

The solutions exhibit singularities interpreted as back-reacting brane-like sources. A key open question is whether these sources correspond to standard string ingredients (e.g., D-branes or orientifolds) or require new microphysical entities.

Clarifying the microscopic identity of the sources would bridge the effective PPEFT characterization used in this work with explicit string constructions, tightening the connection between the derived 4D de Sitter solutions and string theory.