86 citations · 87 across the 4 of their papers we have counts for
4 papers
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…
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…
Classical Limit of Demagnetization in a Field Gradient
Leon Heller
We calculate the rate of decrease of the expectation value of the transverse component of spin for spin-1/2 particles in a magnetic field with a spatial gradient, to determine the…
Less than 50% sublattice polarization in an insulating S=3/2 kagome' antiferromagnet at low T
S. -H. Lee, C. Broholm, M. F. Collins +6
We have found weak long range antiferromagnetic order in the quasi-two-dimensional insulating oxide which contains Cr S=3/2 ions on a kagomé lattice.…