The results show that the atom appears periodically squeezing, and the squeezing properties of atom laser depend closely on both interaction among atoms in BEC and initial squeezing factor of light.
结果表明：由光场诱导的双模原子激光呈现周期性的压缩，原子间的相互作用和光场初始压缩因子对原子的压缩性质具有重要影响。
In chapter 4, laser cooling and trapping and applications of ultracold atoms are reviewed. The beam and atom interaction theory is analyzed.
第四章针对空心光束的应用，综述了激光与原子相互作用的物理机制，分析了空心光束冷却原子的机理以及研究动态。
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