得到简并双光子过程中原子约化密度算符非对角元。
The non-opposite angle element of two-level atom's reducible density rectangular array is obtained.
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。
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.
根据约化密度矩阵与基态能量之间的关系，我们给出了约化保真率和量子相变之间的一般关系。
A general connection between the reduced fidelity susceptibility and quantum phase transitions is given in terms of the relation between reduced density matrix and ground-state energy.
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