  A two-level atom freely falling towards a Schwarzschild black hole was
recently shown to detect radiation in the Boulware vacuum in an insightful
paper [M. O. Scully et al., Proc. Natl. Acad. Sci. U.S.A. 115, 8131 (2018)].
The two-state atom acts as a dipole detector and its interaction with the field
can be modeled using a quantum optics approach. The relative acceleration
between the scalar field and the detector causes the atom to detect the
radiation. In this paper, we show that this acceleration radiation is driven by
the near-horizon physics of the black hole. This insight reinforces the
relevance of near-horizon conformal quantum mechanics for all the physics
associated with the thermodynamic properties of the black hole. We additionally
highlight the conformal aspects of the radiation that is given by a Planck
distribution with the Hawking temperature.
