High Energy Theory Seminar

Localized gravity is the idea of obtaining an effective 4D gravitational theory from higher-dimensions without compactification. This is done by localizing a set of gravitational degrees of freedom along a 4D submanifold (brane-world), while the coupling of the brane-world to the remaining gravitational degrees of freedom is suppressed. A realization in classical gravity was given by A. Karch and L. Randall by inserting an AdS_4 brane-source into AdS_5. I will discuss an embedding of this scenario into string theory by inserting D5- and NS5-branes into the near horizon geometry of D3-branes. In particular, the backreacted solutions are presented and analyzed. Novel AdS_4 geometries relevant to gravity localization are found. I will also discuss their relation to 3D SCFTs.