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arXiv 1502.02496cond-mat.quant-gasphysics.atom-phquant-ph
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量子霍尔体系中玻色气体原子边缘态的可视化

Visualizing edge states with an atomic Bose gas in the quantum Hall regime

B. K. Stuhl, H. -I Lu, L. M. Aycock, D. Genkina, I. B. Spielman

摘要:

我们设计了一个细长的带状几何形状的二维磁晶格,有效的每格元通量~4/3倍的通量量子。我们在这条带上对原子玻色-爱因斯坦凝聚体的定域边缘态和体态进行了成像,沿窄方向具有单格点分辨率。此外,我们观察到跳跃轨道的激发原子沿着我们的系统的边缘,类似于边缘磁等离子体在2-D电子系统,和动态的霍尔效应体激发。我们的晶格的长方向由光晶格的位置组成,而其窄方向由内部原子自旋态组成。我们的技术具有最小的加热,一个功能,将是重要的霍夫施塔特蝴蝶光谱测量和实现劳克林的电荷泵。

英文摘要:

We engineered a two-dimensional magnetic lattice in an elongated strip geometry, with effective per-plaquette flux ~4/3 times the flux quanta. We imaged the localized edge and bulk states of atomic Bose-Einstein condensates in this strip, with single lattice-site resolution along the narrow direction. Further, we observed both the skipping orbits of excited atoms traveling down our system's edges, analogues to edge magnetoplasmons in 2-D electron systems, and a dynamical Hall effect for bulk excitations. Our lattice's long direction consisted of the sites of an optical lattice and its narrow direction consisted of the internal atomic spin states. Our technique has minimal heating, a feature that will be important for spectroscopic measurements of the Hofstadter butterfly and realizations of Laughlin's charge pump.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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