Atsushi Higuchi

We show that static sources coupled to a massless scalar field in Schwarzschild spacetime give rise to emission and absorption of zero-energy particles due to the presence of Hawking radiation. This is in complete analogy with the description of the bremsstrahlung by a uniformly accelerated charge from the coaccelerated observers' point of view. The response rate of the source is found to coincide with that in Minkowski spacetime as a function of its proper acceleration. It is interesting that this quantum result appears to reflect the classical equivalence principle. 04.70.Dy, 04.62.+v Typeset using REVT E X The relation between radiation from accelerated charges and the equivalence principle has for some time been the source of much confusion and discussion. A particularly interesting question is how to reconcile the following two facts (in Minkowski spacetime): On the one hand, an accelerated charge is known to radiate when it is seen from the viewpoint of inertial observers. On t..