Vacuum in a homogeneous gravitational field and excitation of a uniformly accelerated detector

The theory of quantum effects in uniformly accelerated frames of reference and in a homogeneous gravitational field is discussed. Ways of describing processes of excitation of, and radiation from, a uniformly accelerated detector in a uniformly accelerated and in an inertial frame of reference are compared. Particular attention is devoted to a discussion of the equivalence principle for quantum phenomena in connection with the excitation of a uniformly accelerated detector and a detector at rest in a homogeneous gravitational field.