Especially, in the limit of ultracold atoms, a quantum-mechanical treatment of the center-of-mass (CM) motion is required and it leads to a completely new kind of characters of mazer. 尤其是最近激光冷却技术的发明使得传统微激射器在超冷原子极限下表现出一系列全新的性质。
However, as we know under present experimental conditions ultracold atoms injected into a cavity prefer to cluster, therefore, and it is very important to develop a many-atom mazer. 然而实际的实验情况并非如此，超冷原子会成团进入腔中，故此建立描述多原子微激射器的理论是非常有必要的。
