定义：微分算符▽=ex·∂/∂x+ey∂/∂y+ez∂/∂z 微分算符为微积分学中的一个重要概念。
... projection operator投影算符;射影算子 differential operator微分算子;微分算符 boolean operator逻辑算子;布尔操作符 ...
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有关算符的统计平均值随时间的演化满足一个封闭的一阶线性微分方程组。
The statistical average values of some relevant operators satisfy a set of differential equations of the first order.
该方法能方便、简洁地将密度主方程转化为对应的普通微分方程，并能从微分方程的解中提取出约化密度算符。
Using it we can conveniently and simply convert a ME into its corresponding differential equation and from solution of which we can extract the reduced density operator.
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