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gr-qc2016
Absorption of a Particle by a Rotating Black Hole: The Potential Barrier
Leon Heller
For a test particle approaching a rapidly rotating black hole we find a range of values of the particle's energy and angular momentum, on the order of 1\% or more of the correspond…
gr-qc2009
On the Penrose process for rotating black holes
Leon Heller
Penrose described a process that, in principle, could extract energy and angular momentum from a rotating black hole. Here we examine two procedures that were claimed to be capable…