反常莫尔条纹的观察
Observation of Anomalous Moiré Patterns
摘要:
莫尔条纹无处不在。它们对于任何重叠的周期现象都很重要,从振动和电磁到凝聚态。在这里,我们表明,无论是理论上和通过实验模拟的超冷原子,一维有限尺寸的周期性系统,云纹图案引起的异常功能在经典和量子系统。与标准的莫尔现象,其中图案的周期性是其成分之间的节拍音符的结果相反,我们展示了由具有相同周期性的成分形成的莫尔图案。令人惊讶的是,我们还观察到刚性和奇点。此外,我们发现在频域中的普遍性质,这可能是一个新的探针发射。这些一维效应可能与广泛的周期性现象有关。
英文摘要:
Moiré patterns are omnipresent. They are important for any overlapping periodic phenomenon, from vibrational and electromagnetic, to condensed matter. Here we show, both theoretically and via experimental simulations by ultracold atoms, that for one-dimensional finite-size periodic systems, moiré patterns give rise to anomalous features in both classical and quantum systems. In contrast to the standard moiré phenomenon, in which the pattern periodicity is a result of a beat-note between its constituents, we demonstrate moiré patterns formed from constituents with the same periodicity. Surprisingly, we observe, in addition, rigidity and singularities. We furthermore uncover universal properties in the frequency domain, which might serve as a novel probe of emitters. These one-dimensional effects could be relevant to a wide range of periodic phenomena.
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