| Autor: |
Viebahn, Konrad, Sbroscia, Matteo, Carter, Edward, Yu, Jr-Chiun, Schneider, Ulrich |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
Phys. Rev. Lett. 122, 110404 (2019) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.122.110404 |
| Popis: |
Quasicrystals are long-range ordered and yet non-periodic. This interplay results in a wealth of intriguing physical phenomena, such as the inheritance of topological properties from higher dimensions, and the presence of non-trivial structure on all scales. Here we report on the first experimental demonstration of an eightfold rotationally symmetric optical lattice, realising a two-dimensional quasicrystalline potential for ultracold atoms. Using matter-wave diffraction we observe the self-similarity of this quasicrystalline structure, in close analogy to the very first discovery of quasicrystals using electron diffraction. The diffraction dynamics on short timescales constitutes a continuous-time quantum walk on a homogeneous four-dimensional tight-binding lattice. These measurements pave the way for quantum simulations in fractal structures and higher dimensions. |
| Databáze: |
arXiv |
| Externí odkaz: |
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