提出了通过对分束器的条件输出测量制备加光子双模SU(2)相干光场的方案,并研究了Λ型三能级原子与此双模光场相互作用系统中,加光子对原子布居概率及光场非经典性质的影响。结果表明,原子粒子布居概率发生改变,光场一模的光子数统计趋向于亚泊松分布,另一模趋向于超泊松分布,光场两模间相关度增大,非经典相关程度增强。

A scheme of generating a two mode photon added SU(2) coherent field is proposed by means of performing conditional output measurement at the beam splitter. The influences of the added photon on atomic populations and the field′s non classical properties are investigated in the system of such a field interacting with a Λ type three level atom. It is pointed out that the added photon can alter atomic populations significantly. The photon number statistical distribution of one mode tends to sub Poissonian distribution while the other tends to super Poissionian distribution, the correlation between the two modes is enhanced and nonclassical correlation degree is increased.