Efimov three-body states on top of a Fermi sea
Efimov three-body states on top of a Fermi sea
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DOI：
10.1088/1367-2630/16/2/023026
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发表时间：
2011-10
影响因子：
3.3
通讯作者：
N. Nygaard;N. Zinner
中科院分区：
文献类型：
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作者：
N. Nygaard;N. Zinner
束缚电子的库珀对在费米海背景中的稳定性是超导性的起源，也是多体物理学对少体性质产生显著影响的典型例子。在量子力学的三体问题中，著名的埃菲莫夫效应在一堆宇宙态之间产生了意想不到的标度关系。由于超冷原子气体实验的成功，这些看似无关的问题现在可以在同一装置中进行研究。鉴于背景费米海对两体性质的巨大影响，一个自然的问题是背景是否可以修改甚至破坏Efimov效应。在这里，我们演示了如何通用的问题，三个相互作用的粒子的变化时，一个粒子嵌入在背景费米海，并显示Efimov缩放持续存在。它存在于将三体物理学与费米子粒子的背景密度联系起来的标度中。
The stabilization of Cooper pairs of bound electrons in the background of a Fermi sea is the origin of superconductivity and the paradigmatic example of the striking influence of many-body physics on few-body properties. In the quantum-mechanical three-body problem the famous Efimov effect yields unexpected scaling relations among a tower of universal states. These seemingly unrelated problems can now be studied in the same setup thanks to the success of ultracold atomic gas experiments. In light of the tremendous effect of a background Fermi sea on two-body properties, a natural question is whether a background can modify or even destroy the Efimov effect. Here we demonstrate how the generic problem of three interacting particles changes when one particle is embedded in a background Fermi sea, and show that Efimov scaling persists. It is found in a scaling that relates the three-body physics to the background density of fermionic particles.