对相干态与两个原子的相互作用过程中原子与场的动力学特性

DYNAMICAL PROPERTIES OF ATOMS AND FIELD IN THE INTERACTION OF PAIR COHERENT STATE WITH TWO ATOMS

研究了对相干态(pair coherent state)与两个二能级原子的相互作用过程中原子和场的动力学特性,并讨论了原子间的偶极相互作用对它们的影响.结果表明:辐射场的压缩以及和压缩(sum squeezing)的幅度,出现的次数均随原子间的耦合强度的增加而迅速减小.当两个模之间的光子数差增大时,辐射场的压缩以及和压缩的幅度,出现的次数均随之减小,辐射场的两模之间的非经典相关程度减弱,模1的亚泊松分布减弱.在原子的崩溃区域,模2的亚泊松分布增强.增大q将加快原子和双模光场的能量交换.

We study the dynamical poperties of atoms and field under the interaction of pair coherent state with two two-level atoms, and discuss how they are modified by dipole-dipole interaction. The numerical results show that the degrees and the revivals of the squeezing as well as the sum-squeezing of the field decrease with increasing dipole-dipole interaction. When the difference in the number of photons q increases, the degrees and the revivals of the squeezing as well as the sum-squeezing of the field decrease, the nonclassical correlation between two modes get weaker, the sub-Poissonian distribution for mode 1 get wider, and that for mode 2 becomes narrower in the collapse region. The increase in q results in speeding up of the energy exchange between atoms and the two-mode light field.