Lasers play an important role in atom optics atomic beam 经典原子光学 Diffraction Optical lens Optical mirror Interferometers /要天如 量子原子光学厘m PHYSICAL REVIEW LETTERS COHEE厘 Observation of Atom Pairs in Spontaneous Four- Wave Mixing of Two Colliding Bose-Einstein CondensateLasers play an important role in atom optics Diffraction Optical lens Optical mirror Interferometers 量子原子光学 经 典 原 子 光 学