2025-06-04 チャルマース工科大学
＜関連情報＞
- https://news.cision.com/chalmers/r/magnetism-in-new-exotic-material-opens-the-way-for-robust-quantum-computers,c4158298
- https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.134.116605
設計された近藤格子におけるトポロジカル・ゼロモードと相関ポンピング Topological Zero Modes and Correlation Pumping in an Engineered Kondo Lattice
Zina Lippo, Elizabeth Louis Pereira, Jose L. Lado, and Guangze Chen
Physical Review Letters Published: 18 March, 2025
DOI: https://doi.org/10.1103/PhysRevLett.134.116605
Abstract
Topological phases of matter provide a flexible platform to engineer unconventional quantum excitations in quantum materials. Beyond single particle topological matter, in systems with strong quantum many-body correlations, many-body effects can be the driving force for non-trivial topology. Here, we propose a one-dimensional engineered Kondo lattice where the emergence of topological excitations is driven by collective many-body Kondo physics. We first show the existence of topological zero modes in this system by solving the interacting model with tensor networks, and demonstrate their robustness against disorder. To unveil the origin of the topological zero modes, we analyze the associated periodic Anderson model showing that it can be mapped to a topological non-Hermitian model, enabling rationalizing the origin of the topological zero modes. We finally show that the topological invariant of the many-body Kondo lattice can be computed with a correlation matrix pumping method directly with the exact quantum many-body wave function. Our results provide a strategy to engineer topological Kondo insulators, highlighting quantum magnetism as a driving force in engineering topological matter.
