Competition and interplay between topology and quasi-periodic disorder in Thouless pumping of ultracold atoms
| Autor: | Yoshiro Takahashi, Yoshihito Kuno, Pasquale Marra, Nobuyuki Takei, Shuta Nakajima, Keita Sakuma |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Optical lattice Sequence FOS: Physical sciences General Physics and Astronomy Perturbation (astronomy) Macroscopic quantum phenomena Topology 01 natural sciences 010305 fluids & plasmas Quantum Gases (cond-mat.quant-gas) Ultracold atom 0103 physical sciences Topological order Limit (mathematics) Condensed Matter - Quantum Gases 010306 general physics Topology (chemistry) |
| Zdroj: | Nature Physics. 17:844-849 |
| ISSN: | 1745-2481 1745-2473 |
| DOI: | 10.1038/s41567-021-01229-9 |
| Popis: | Robustness against perturbations lies at the heart of topological phenomena. If, however, a perturbation such as disorder becomes dominant, it may cause a topological phase transition between topologically non-trivial and trivial phases. Here we experimentally reveal the competition and interplay between topology and quasi-periodic disorder in a Thouless pump realized with ultracold atoms in an optical lattice, by creating a quasi-periodic potential from weak to strong regimes in a controllable manner. We demonstrate a disorder-induced pumping in which the presence of quasi-periodic disorder can induce a non-trivial pump for a specific pumping sequence, while no pump is observed in the clean limit. Our highly controllable system, which can also straightforwardly incorporate interatomic interaction, could be a unique platform for studying various disorder-related novel effects in a wide range of topological quantum phenomena. 9 + 9 pages, 5 + 9 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink