与级联三能级原子相互作用的二项式光场的量子特性

运用全量子理论并借助于数值计算方法,研究了与级联三能级原子相互作用的二项式光场的反聚束效应和压缩效应等量子特性,讨论了光场的初始参量对光场量子特性的影响.结果为:当初始光场处于相干态时,光场的反聚束效应间断出现,光场存在较短时间的压缩效应;当初始光场处于中间态时,光场呈现出持续的反聚束效应,其压缩效应的深度和持续时间增加;当初始光场过渡到数态时,光场仍然呈现出持续的反聚束效应,但压缩效应明显减弱直到消失.结果表明:在与原子相互作用过程中,二项式光场展现出显著的非经典性质.

Quantum properties of the binomial state field interacting with a cascade three-level atom

Antibunching effect and squeezing property of the binomial state field interacting with a cascade three-level atom are studied by using quantum theory and calculation method, and the influences of initial field parameters on the quantum properties of the field are discussed. The results are that, firstly, when the field is initially in a coherent state, its antibunching effect can be displayed discontinuously and squeezing effect can be exhibited in a short time; Secondly, when the initial field is in a middle state between the coherent state and number state, the field shows antibunching effect continuously and the deep degree and sustained time of its squeezing effect increase; Finally, while when the initial field transmits to a lock state, the field reveals continuously antibunching effect but its squeezing effect weakens to disappear. Our results show that binomial state field displays remarkable no-classical properties when it interacts with a cascade three-level atom.