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.
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。
The evolution opera tor, the reduce density operator and the dynamical properties of the field entropy evolution in the intensity - dependent coupling multiphoton J - C model are studied.
研究了依赖强度耦合多光子J—C模型的演化算符，约化密度算符及其场熵特性。
In the quantum statistical theory, the density operator is introduced in the statistical system. The expectation value of an obeservable can be obtained by the use of the density operator.
在量子统计中，对统计系综引入了密度算符，力学量的平均值可以利用密度算符求出。
However, RMS deviation only contains the second-order statistical moments of the density operator. Thus under many circumstances, RMS deviation cannot precisely measure the quantum fluctuation.
由于均方根偏差只涉及光场密度矩阵的二阶统计矩，在许多情况下，这种物理量不能精确量度光场的量子涨落。
However, RMS deviation only contains the second-order statistical moments of the density operator. Thus under many circumstances, RMS deviation cannot precisely measure the quantum fluctuation.
由于均方根偏差只涉及光场密度矩阵的二阶统计矩，在许多情况下，这种物理量不能精确量度光场的量子涨落。
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