Hidden Anderson localization in disorder-free Ising–Kondo lattice?

• 作者: Lan Zhang Wei-Wei Yang Xue-Ming Guo Yin Zhong
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2020,（10）
• 所属期刊栏目: CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL,MAGNETIC,AND OPTICAL PROPERTIES
• 页码范围: 550-558
• 页数: 9页
• 语种: 英文
• DOI: 10.1088/1674-1056/ab99b0

摘要

Anderson localization (AL) phenomena usually exist in systems with random potential. However, disorder-free quan-tum 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 partic-ipation 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.