60 citations · 254 across the 9 of their papers we have counts for
9 papers · 1 filter
Asymptotically flat (1,m,n) superstrata: a farewell to AdS
Willem Govaerts, Robert Walker
Superstrata microstate geometries furnish some of the most successful laboratories, to date, for probing black hole microstructure in a geometric setting. This paper extends the (1…
Separability in Consistent Truncations
Krzysztof Pilch, Robert Walker, Nicholas P. Warner
The separability of the Hamilton-Jacobi equation has a well-known connection to the existence of Killing vectors and rank-two Killing tensors. This paper combines this connection w…
Microstate Geometries from Gauged Supergravity in Three Dimensions
Daniel R. Mayerson, Robert A. Walker, Nicholas P. Warner
The most detailed constructions of microstate geometries, and particularly of superstrata, are done using supergravity coupled to two anti-self-dual tensor mu…
Holomorphic Waves of Black Hole Microstructure
Pierre Heidmann, Daniel R. Mayerson, Robert Walker +1
We obtain the largest families constructed to date of -BPS solutions of type IIB supergravity. They have the same charges and mass as supersymmetric D1-D5-P black hol…
D1-D5-P superstrata in 5 and 6 dimensions: separable wave equations and prepotentials
Robert Walker
We construct the most general single-mode superstrata in 5 dimensions with ambipolar, two centered Gibbons Hawking bases, via dimensional reduction of superstrata in 6 dimensions.…
Early Scrambling and Capped BTZ Geometries
Iosif Bena, Emil J. Martinec, Robert Walker +1
Geodesic probes in certain horizonless microstate geometries experience extreme tidal forces long before reaching the region where these geometries differ significantly from the ex…
The Structure of BPS Equations for Ambi-polar Microstate Geometries
Alexander Tyukov, Robert Walker, Nicholas P. Warner
Ambi-polar metrics, defined so as to allow the signature to change from +4 to -4 across hypersurfaces, are a mainstay in the construction of BPS microstate geometries. This paper e…
Tidal Stresses and Energy Gaps in Microstate Geometries
Alexander Tyukov, Robert Walker, Nicholas P. Warner
We compute energy gaps and study infalling massive geodesic probes in the new families of scaling, microstate geometries that have been constructed recently and for which the holog…
Integrability and Black-Hole Microstate Geometries
Iosif Bena, David Turton, Robert Walker +1
We examine some recently-constructed families of asymptotically-AdSS supergravity solutions that have the same charges and mass as supersymmetric D1-D5-P black holes…