推导出一个关于X结构密度矩阵的量子失协表达式.在单一激发下,给出两个非耦合的量子比特分别与库相互作用构成系统的动力学的精确解,用非马尔科夫主方程方法精确求解了这个系统的耗散动力学.在失谐光谱密度下,讨论和比较不同耦合区域内系统的量子失协动力学特征.结果表明:量子失协表达式适用于任意有X型密度矩阵的物理系统,在失谐光谱密度下,证实两类主方程分别适用于不同的耦合区域.这将为以后更加简便地计算量子失协,以及在不同的耦合区域运用哪一类主方程提供一定的参考依据.
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