The Boulware State and the Generalised Second Law of Thermodynamics
arXiv:gr-qc/9402030 · doi:10.1103/PhysRevD.50.4786
Abstract
We show that the appropriate vacuum state for the interior of a box with reflecting walls being lowered adiabatically into a Schwarzschild black hole is the Boulware state. This is concordant with the results of Unruh and Wald, who used a different approach to obtain the stress-energy inside the box. Some comments about an entropy bound for ordinary matter, as first conjectured by Bekenstein, are presented.
12 pages, RevTeX,Alberta-Thy-3-94