504 citations · 2.7k across the 41 of their papers we have counts for
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hep-th2018★ 19 cited
Kinematic space and the orbit method
Robert F. Penna, Claire Zukowski
Kinematic space has been defined as the space of codimension- spacelike extremal surfaces in anti de Sitter (AdS) spacetime which, by the Ryu-Takayanagi proposal, comput…
hep-th2018★ 4 cited
Asymptotic symmetries of three dimensional gravity and the membrane paradigm
Mariana Carrillo-Gonzalez, Robert F. Penna
The asymptotic symmetry group of three-dimensional (anti) de Sitter space is the two dimensional conformal group with central charge . Usually the asymptotic charge alg…
hep-th2018
and the orbit method
Robert F. Penna
The group of area preserving diffeomorphisms of the two sphere, , is one of the simplest examples of an infinite dimensional Lie group. It plays a key role in inc…