在与电子纵向运动静止的坐标系中，把晶格场等效为虚光子。
In the reference system of the electron at rest, the crystal field is taken as virtual photon.
研究了双模压缩真空场与二能级原子双光子跃迁相互作用系统中光场的压缩特性及虚光子过程对光场压缩特性的影响。
The time evolution of light squeezing in the system of two-mode squeezed vacuum field interacting with a two-level atom in generalized Kerr-medium are studied by means of quantum theory.
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