Knowledge Management System of Institute of Theoretical Physics, CAS
| Zhou, Longwen1; Du, Qianqian | |
| Floquet topological phases with fourfold-degenerate edge modes in a driven spin-1/2 Creutz ladder | |
| Source Publication | PHYSICAL REVIEW A
 |
| Language | 英语 |
| Keyword | CHIRAL-SYMMETRY STATES SURFACE |
| Abstract | Floquet engineering has the advantage of generating new phases with large topological invariants and many edge states by simple driving protocols. In this work, we propose an approach to obtain Floquet topological phases with fourfold-degenerate edge states and even-integer topological invariants in a spin-1/2 Creutz ladder model, which is realizable in current experiments. Putting the ladder under periodic quenches, we found rich Floquet topological phases in the system, which belong to the symmetry class CII. Each of these phases is characterized by a pair of even integer topological invariants (w(0), w(pi)) is an element of 2Z x 2Z, which can take arbitrarily large values with the increase of driving parameters. Under the open boundary condition, we further obtain multiple quartets of topological edge states with quasienergies zero and pi in the system. Their numbers are determined by the bulk topological invariants (w(0), w(pi)) due to the bulk-edge correspondence. Finally, we propose a way to dynamically probe the Floquet topological phases in our system by measuring a generalized mean chiral displacement. Our findings thus enrich the family of Floquet topological matter, and put forward the detection of their topological properties. |
| 2020 | |
| ISSN | 2469-9926 |
| Volume | 101Issue:3Pages:33607 |
| Cooperation Status | 国内 |
| Subject Area | Optics ; Physics |
| MOST Discipline Catalogue | Optics ; Physics, Atomic, Molecular & Chemical |
| DOI | 10.1103/PhysRevA.101.033607 |
| Indexed By | SCIE |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itp.ac.cn/handle/311006/26985 |
| Collection | SCI期刊论文 |
| Affiliation | 1.Ocean Univ China, Dept Phys, Coll Informat Sci & Engn, Qingdao 266100, Peoples R China 2.Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Zhou, Longwen,Du, Qianqian. Floquet topological phases with fourfold-degenerate edge modes in a driven spin-1/2 Creutz ladder[J]. PHYSICAL REVIEW A,2020,101(3):33607. |
| APA | Zhou, Longwen,&Du, Qianqian.(2020).Floquet topological phases with fourfold-degenerate edge modes in a driven spin-1/2 Creutz ladder.PHYSICAL REVIEW A,101(3),33607. |
| MLA | Zhou, Longwen,et al."Floquet topological phases with fourfold-degenerate edge modes in a driven spin-1/2 Creutz ladder".PHYSICAL REVIEW A 101.3(2020):33607. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Floquet topological （1196KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | Application Full Text | |
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