附加Kerr介质对级联三能级Jaynes-Cummings模型光场统计的影响

Effect of Additional Kerr Medium on Field Statistics in Cascade Three-level Jaynes-Cummings Model

在假设输入光场为单模相干场,原子制备在最高激发态的条件下,运用全量子论方案研究了Kerr介质腔中M andel Q因子随时间演化特点。结果表明:当单光子失谐量较大时,Kerr效应对光场与级联三能级原子非共振相互作用系统的光子非经典统计性质有较大影响。对弱相干输入光场,Kerr效应降低光子非经典统计性质;对强相干输入光场,Kerr效应有助于增强光子的非经典统计性质。

Under the assumption that the input field is in the coherent state and the atom is prepared in the most excited state, the time evolution of the Mandel Q factor in a system consisting of a cascade atom embedded in a Kerr medium is investigated by using the full quantum mechanical scheme. It is found that Kerr effect has a great influence on the non-classical photon statistics in the case of large single-photon detuning in the system. Kerr effect suppresses non-classical photon statistics for the weak input coherent field and enhances it for the strong input coherent field.