Microscopic origin and universality classes of the Efimov three-body parameter.
Microscopic origin and universality classes of the Efimov three-body parameter.
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DOI：
10.1103/physrevlett.112.105301
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发表时间：
2014-03
影响因子：
8.6
通讯作者：
P. Naidon;Shimpei Endo;Masahito Ueda
中科院分区：
文献类型：
--
作者：
P. Naidon;Shimpei Endo;Masahito Ueda
在Efimov区，三个粒子通过接近共振的两体相互作用产生的低能谱由所谓的三体参数决定。结果表明，三体参数本质上是由零能二体关联决定的。因此，我们确定了两类两体相互作用，对于三体参数，三体参数以其有效范围为单位具有普适值。其中一类涉及最近在超冷原子系统中发现的三体参数的普适性。另一个与核物理和固体物理中的短程相互作用有关。
The low-energy spectrum of three particles interacting via nearly resonant two-body interactions in the Efimov regime is set by the so-called three-body parameter. We show that the three-body parameter is essentially determined by the zero-energy two-body correlation. As a result, we identify two classes of two-body interactions for which the three-body parameter has a universal value in units of their effective range. One class involves the universality of the three-body parameter recently found in ultracold atom systems. The other is relevant to short-range interactions that can be found in nuclear physics and solid-state physics.