用全量子理论方法,研究弱克尔介质好腔中Bell态原子与纠缠相干态光场相互作用系统的保真度.结果表明,对理想腔,若原子初始处于相干保持态,腔场初态的平均光子数很小,保真度始终等于1,随着平均光子数的增加,保真度单调衰减;若处于其余Bell态之一,腔场初态的平均光子数很小,保真度在0～1之间作周期性振荡,随着平均光子数的增加,保真度的振荡频率增大,振幅减小.对好腔,若原子初始处于相干保持态,系统保真度呈指数单调衰减;若处于其余Bell态之一,保真度呈指数振荡衰减,且随着平均光子数的增加,保真度的振荡频率增大.
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