Physics

We develop the idea of an effective conformal theory describing the low-lying spectrum of the dilatation operator in a CFT. Such an effective theory is useful when the spectrum contains a hierarchy in the dimension of operators, and a small...

Microstate geometries are smooth horizonless geometries with the same boundary conditions as a black hole. I review what is currently known about the extensive families of such BPS geometries, how they resolve black-hole singularities and how they...