论文标题
二维费米克混合物中的通用四聚体和五聚物
Universal tetramer and pentamer in two-dimensional fermionic mixtures
论文作者
论文摘要
我们研究了二维$（n+1）$系统中通用四聚体和五聚体绑定状态的出现，该系统由$ n $相同的重型费米子与光原子相互作用。我们表明，在三聚机阈值以下的（$ 3+1 $）四聚体（$ 3+1 $）的四个质量比率为$ 3.38 $，并且在四聚体阈值以下（$ 4+1 $）的Pentamer为$ 5.14 $。尽管这些基态四聚体和五聚体的总角动量为零，但由于它们在二聚体纤维框架中的独特角动量分解，它们在动量空间中表现出非常不同的密度分布和相关性。这些通用结合的状态可以通过现在在冷原子实验室中实现的许多Fermi-Fermi混合物来访问，这也表明在相应的多体系统中，新型的几个体型相关性主导着。
We study the emergence of universal tetramer and pentamer bound states in the two-dimensional $(N+1)$ system, which consists of $N$ identical heavy fermions interacting with a light atom. We show that the critical heavy-light mass ratio to support a ($3+1$) tetramer below the trimer threshold is $3.38$, and to support a ($4+1$) pentamer below the tetramer threshold is $5.14$. While these ground state tetramer and pentamer are both with zero total angular momentum, they exhibit very different density distributions and correlations in momentum space, due to their distinct angular momentum decompositions in the dimer-fermion frame. These universal bound states can be accessible by a number of Fermi-Fermi mixtures now realized in cold atoms laboratories, which also suggest novel few-body correlations dominant in their corresponding many-body systems.
