考虑了原子的偶极相互作用,通过计算Tavis-Cummings模型下压缩真空态的保真度,阐明了在双模压缩真空态与环境(原子)通过双光子发生相互作用过程中量子信息的保真程度随时间的演化关.通过计算机模拟出两原子处于各种初态下时原子、光场和系统的保真度随时间的演化图象,分析出三者在压缩指数r、偶极相互作用常数ga和相位ψ等改变时的变化情况,结果表明r和k值的改变对于提高保真度具有重要意义.当两原子处于基态时减小r和当两原子处于一Bell基时增大都可以显著的提高体系的保真度.
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