中国物理B ›› 2020, Vol. 29 ›› Issue (10): 107301-.doi: 10.1088/1674-1056/ab99b0

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Wei-Wei Yang(杨薇薇)1, Lan Zhang(张欄)1, Xue-Ming Guo(郭雪明)1, Yin Zhong(钟寅)1,†()   

  • 收稿日期:2020-02-10 修回日期:2020-06-02 接受日期:2020-06-05 出版日期:2020-10-05 发布日期:2020-10-05
  • 通讯作者: Yin Zhong(钟寅)

Hidden Anderson localization in disorder-free Ising–Kondo lattice

Wei-Wei Yang(杨薇薇), Lan Zhang(张欄), Xue-Ming Guo(郭雪明), and Yin Zhong(钟寅)†   

  1. 1 School of Physical Science and Technology & Key Laboratory for Magnetism and Magnetic Materials of the MoE, Lanzhou University, Lanzhou 730000, China
  • Received:2020-02-10 Revised:2020-06-02 Accepted:2020-06-05 Online:2020-10-05 Published:2020-10-05
  • Contact: Corresponding author. E-mail: zhongy@lzu.edu.cn
  • About author:
    †Corresponding author. E-mail: zhongy@lzu.edu.cn
    * Project supported in part by the National Natural Science Foundation of China (Grant Nos. 11704166, 11834005, and 11874188).

Abstract:

Anderson localization (AL) phenomena usually exist in systems with random potential. However, disorder-free quantum many-body systems with local conservation can also exhibit AL or even many-body localization transition. We show that the AL phase exists in a modified Kondo lattice without external random potential. The density of state, inverse participation ratio and temperature-dependent resistance are computed by classical Monte Carlo simulation, which uncovers an AL phase from the previously studied Fermi liquid and Mott insulator regimes. The occurrence of AL roots from quenched disorder formed by conservative localized moments. Interestingly, a many-body wavefunction is found, which captures elements in all three paramagnetic phases and is used to compute their quantum entanglement. In light of these findings, we expect that the disorder-free AL phenomena can exist in generic translation-invariant quantum many-body systems.

Key words: Anderson localization, Ising-Kondo lattice, many-body wavefunction, quantum entanglement

中图分类号:  (Localization effects (Anderson or weak localization))

  • 72.15.Rn
75.30.Mb (Valence fluctuation, Kondo lattice, and heavy-fermion phenomena)