2010/06/22 by Gavin Polhemus, Andrew J S Hamilton, Andrew J.S. Hamilton
Physics and Astronomy · #Apparent horizon #Astrophysical Phenomena and Observations #Black Holes and Theoretical Physics #Black brane #Black hole (networking) #Entropy (arrow of time) #Entropy production #Event horizon #Horizon #Limiting #Quantum Electrodynamics and Casimir Effect #White hole #astro-ph.CO #gr-qc #hep-th
paper · pdf · doi:10.1007/jhep08(2010)093
published as JHEP 1008:093,2010 · 10 pages
arxiv created 2010/06/22 · openalex publication_date 2010/08/01 · arxiv updated 2012/01/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Particles dropped into a rotating black hole can collide near the inner horizon with enormous energies. The entropy produced by these collisions can be several times larger than the increase in the horizon entropy due to the addition of the particles. In this paper entropy is produced by releasing large numbers of neutrons near the outer horizon of a rotating black hole such that they collide near the inner horizon at energies similar to those achieved at the Relativistic Heavy Ion Collider. The increase in horizon entropy is approximately 80 per dropped neutron pair, while the entropy produced in the collisions is 160 per neutron pair. The collision entropy is produced inside the horizon, so this excess entropy production does not violate Bousso's bound limiting the entropy that can go through the black hole's horizon. The generalized laws of black hole thermodynamics are obeyed. No individual observer inside the black hole sees a violation of the second law of thermodynamics