On the relaxation of an N-level system under gauss noise

Abstract

In the evolution of an N-level system interacting with an external noise there is in general a specific phase transition from damped oscillations to an aperiodic motion when the intensity of the external noise increases. But in some cases the region of aperiodic motion can be absent. On the other hand, several such regions can exist. Under some conditions a strong interaction with environment can stabilize a nonstationary quantum state of the system.