INSTABILITIES IN THERMAL BATH : PHONON ENHANCEMENT AND SATURATION IN A THREE-LEVEL SYSTEM

Abstract
The equations, determining temporal behavior of coupled electronic and phonon subsystems in the electromagnetic field, are analyzed. The steady state solution describing saturation of the three level in such a system is achieved. It is shown that laser-like self-excitation of phonons cannot be obtained though essential phonon enhancement may be gained provided certain conditions are fulfilled. Field induced transparency is predicted between first two levels when the field saturates ground and highest levels, and the concentration of ions is high.