Dynamics of the generation of the pure two-atom squeezed state

摘要

Time evolution of a two-atom system dumped by a broad-band squeezed vacuum is examined. We show that in the squeezed vacuum the collective atomic luvels are no longer eigenatates of the system, Diugonaliidng the density matrix of the system, -we find new 'dressed' eigenstates of the system and show that the evolution of the population ol' the dressed .states is characterized by three different relaxation times, two of them strongly modified by the squeezed correlations. We- find that the effect of the squeezed vacuum on the system appears (in a time-scale larger than the shortest relaxation time of the system, and the relaxation iinu: cil the system to ihe pure two-atom squeezed state is strongly dependent on the intensity N of the squeezed vacuum and increases with increasing N.