From Soft Walls to Infrared Branes

Understand

Five dimensional warped spaces with soft walls are generalizations of the standard Randall-Sundrum compactifications, where instead of an infrared brane one has a curvature singularity (with vanishing warp factor) at finite proper distance in the bulk.

• We project the physics near the singularity onto a hypersurface located a small distance away from it in the bulk.
• This results in a completely equivalent description of the soft wall in terms of an effective infrared brane, hiding any singular point.
• We perform explicitly this calculation for two classes of soft wall backgrounds used in the literature.