The Unruh vacuum and the in-vacuum in the Reissner-Nordström spacetime
arXiv:2311.09943 · doi:10.3390/universe10010018
Abstract
The Unruh vacuum is widely used as quantum state to describe black hole evaporation since near the horizon it reproduces the physical state of a quantum field, the so called in-vacuum, in the case the black hole is formed by gravitational collapse. We examine the relation between these two quantum states in the background spacetime of a Reissner-Nordström black hole (both extremal and not) highlighting similarities and striking differences.
arXiv commentone misprint corrected. 22 pages, 6 figures. Final version. Paper dedicated to Richard Kerner in the occasion of his 80th birthday
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