格点上的弹性多体相互作用
Elastic Multi-Body Interactions on a Lattice
摘要：
通过耦合光晶格中原子的两个超精细态，我们可以独立地控制两体、三体和四体在位相互作用。特别是，在目前实验的典型条件下，可以有一个纯粹的三体或四体相互作用气体的$^{39}$ K原子的特点是现场相互作用位移的几个100赫兹。
英文摘要：
We show that by coupling two hyperfine states of an atom in an optical lattice one can independently control two-, three-, and four-body on-site interactions in a non-perturbative manner. In particular, under typical conditions of current experiments one can have a purely three- or four-body interacting gas of $^{39}$K atoms characterized by on-site interaction shifts of several 100Hz.
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