Hidden Anderson localization in disorder-free Ising–Kondo lattice  

作　　者：Wei-Wei Yang Lan Zhang Xue-Ming Guo Yin Zhong 杨薇薇;张欄;郭雪明;钟寅(School of Physical Science and Technology&Key Laboratory for Magnetism and Magnetic Materials of the MoE,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]School of Physical Science and Technology&Key Laboratory for Magnetism and Magnetic Materials of the MoE,Lanzhou University,Lanzhou 730000,China

出　　处：《Chinese Physics B》2020年第10期451-458,共8页中国物理B（英文版）

基　　金：Project supported in part by the National Natural Science Foundation of China(Grant Nos.11704166,11834005,and 11874188).

摘　　要：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.

关 键 词：Anderson localization Ising-Kondo lattice many-body wavefunction quantum entanglement 

分 类 号：O469[理学—凝聚态物理]