We have found out the equation of density matrix evolution of the two-level atomic system in the classic electromagnetism field. The Law of coherence of the state is obtained.
求解了经典电磁场中二能级原子系统的密度矩阵演化方程，得到了系统状态的相干特性。
The time evolution of atomic dipole squeezing in the intensity-dependent coupling interaction between squeezing vacuum state and V-type three-level atom is studied using the quantum theory.
利用全量子理论，研究了压缩真空场与V型三能级原子依赖强度耦合作用系统中原子的偶极压缩效应。
The time evolution of atomic dipole squeezing in the intensity-dependent coupling interaction between squeezing vacuum state and V-type three-level atom is studied using the quantum theory.
利用全量子理论，研究了压缩真空场与V型三能级原子依赖强度耦合作用系统中原子的偶极压缩效应。
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