【摘要】 从密度矩阵形式的Ｂｌｏｃｈ方程和Ｍａｘｗｅｌ传播方程出发，建立了二能级双脉冲传播的三维半经典理论模式，并给出了数值求解结果．考察了双脉冲在介质中的时空演化，发现了三维空间中双脉冲合并的特性，并与单脉冲的传播进行了比较．更多还原

【Abstract】 Abstract Based on the Bloch Maxwell equation,the three dimensional model for the double pulse propagation in a two level system was set up.The propagation of the double pulses with different areas has been described and compared to that of the single pulse.The pulse mergence has been found in the double pulse propagation.更多还原