Ab. Klimov et V. Altuzar, SPECTRUM OF PHOTONS GENERATED IN A ONE-DIMENSIONAL CAVITY WITH OSCILLATING BOUNDARY, Physics letters. A, 226(1-2), 1997, pp. 41-45
The spectrum of photons generated in a one-dimensional resonator whose
wall is oscillating with twice the frequency of the fundamental mode
in both long- and short-time limits is found. It is shown that for sho
rt times photons are generated mainly in the fundamental cavity mode.
In the long-time limit photons are generated in a wide frequency band
whose width grows exponentially fast in time.