We find that, when neglecting the interparticle interactions, the adiabatic fidelity for the coherent population trapping ( CPT) state or dark state, as the function of the adiabatic parameter, approaches to unit in a power law. 研究发现,当不考虑粒子间的非线性碰撞时,该系统的相干布居俘获态-暗态的绝热保真度作为绝热参量的函数以幂律关系趋于1。