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arXiv 1202.3284cond-mat.str-el
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一维短程相互作用少费米子系统中Wigner分子的不存在

Absence of Wigner molecules in one-dimensional few-fermion systems with short-range interactions

Jing-Jing Wang, Wei Li, Shu Chen, Gao Xianlong, Massimo Rontani, Marco Polini

摘要:

利用精确对角化方法研究了一维简谐势囚禁的具有强短程排斥相互作用的少费米子系统的基态。即使当基态密度分布在强耦合下显示出非常明显的具有“4k_F相干性”的弗里德尔振荡时,对关联函数也没有显示出任何维格纳分子型关联的特征。为了比较,我们还给出了具有库仑相互作用的少电子系统的数值结果,表明它们在强耦合时的基态是Wigner分子。

英文摘要:

We study by means of exact-diagonalization techniques the ground state of a few-fermion system with strong short-range repulsive interactions trapped by a harmonic potential in one spatial dimension. Even when the ground-state density profile displays at strong coupling very well pronounced Friedel oscillations with a `4k_F periodicity', the pair correlation function does not show any signature of Wigner-molecule-type correlations. For the sake of comparison, we present also numerical results for few-electron systems with Coulomb interactions, demonstrating that their ground state at strong coupling is, on the contrary, a Wigner molecule.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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