Vacuum Radiation from Massive Scalar Field

Abstract

The vacuum radiation of a massive scalar field is studied by means of a single moving mirror. The field equation with an arbitrary-shaped mirror moving in (d + 1) dimensions is given perturbatively in the non-relativistic limit. Explicit results are obtained for a flat mirror moving in (1 + 1) dimensions and (3 + 1) dimensions. The vacuum radiation power and vacuum friction force on the mirror are given in (1 + 1) dimensions. The intrinsic mass of the field is found to suppress the vacuum radiation. In (3 + 1) dimensions, the modification of the frequency spectra and angular spectra of emitted particles due to the intrinsic mass are obtained. In the limit of m → 0, we recover the results of the massless field.