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arXiv 1907.02421cond-mat.str-el
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极低密度下Wigner分子的数值精确研究

A Wigner molecule at extremely low densities: a numerically exact study

Miguel Escobar Azor, Léa Brooke, Stefano Evangelisti, Thierry Leininger, Pierre-François Loos, Nicolas Suaud, J. A. Berger

摘要:

在这项工作中,我们调查维格纳本地化在非常低的密度通过精确对角化的哈密顿量。这产生了数值上精确的结果。特别是,我们研究了一个准一维系统的两个电子被限制在一个环的三维高斯放置沿环周长。为了描述Wigner局域化,我们研究了几个合适的观测量,即两体约化密度矩阵,局域化张量和粒子-空穴熵。我们表明,本地化张量是最有前途的量研究维格纳本地化,因为它准确地捕捉到从离域到本地化状态的过渡,它可以应用于所有大小的系统。

英文摘要:

In this work we investigate Wigner localization at very low densities by means of the exact diagonalization of the Hamiltonian. This yields numerically exact results. In particular, we study a quasi-one-dimensional system of two electrons that are confined to a ring by three-dimensional gaussians placed along the ring perimeter. To characterize the Wigner localization we study several appropriate observables, namely the two-body reduced density matrix, the localization tensor and the particle-hole entropy. We show that the localization tensor is the most promising quantity to study Wigner localization since it accurately captures the transition from the delocalized to the localized state and it can be applied to systems of all sizes.

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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