【摘要】 运用全量子理论,研究了Λ型三能级原子与二项式光场相互作用过程中光场的量子特性;讨论了Λ型三能级原子初始状态和二项式光场系数对光场压缩和二阶相干度特性的影响。在选择较小的原子失谐量γ和二项式光场系数η时,光场表现为光子聚束效应和反聚束效应交替出现,若上述参量较大时,光场呈现完全的反聚束效应;适当选取Δ和η,在一定时域内耦合系统光场的X₁分量将呈现出压缩效应。表明二项式光场与Λ型三能级原子作用时,光场在一定条件下将处于压缩态,且可呈现出持续的反聚束特性。更多还原

【Abstract】 The quantum properties of light in the system of Λ-type three-level atom interacting with radiation fields in binomial states are studied by means of quantum theory.The influences of the initial states of the Λ-type three-level atom and the parameter of the binomial optical fields on squeezing of the optical field and the second-order coherence degree are investigated in detail.As the detuning parameter of atom A and the parameter of the binomial optical fieldηare small,bunching and antibunching effect can be exhibited alternatively.With the increase of the parameters,the light field shows antibunching effect completely.If the detuning parameter of atomΔand the parameterηare chosen appropriately, the component X₁ of the light field in the coupling system will be squeezed during the certain time.The results indicate that the light field shows squeezing effects and continuous antibunching effect under a certain condition as it interactes with a A-type three-level atom.更多还原