Topological edge states and Aharanov-Bohm caging with ultracold atoms carrying orbital angular momentum

平带里德伯晶格中相互作用驱动的 Aharonov-Bohm 囚禁破缺

Interaction-driven breakdown of Aharonov--Bohm caging in flat-band Rydberg lattices

本文在合成维度平带菱形晶格中用强相互作用里德伯原子实验实现了可调 U(1) 规范场下的 Aharonov-Bohm 囚禁，并揭示了强偶极相互作用驱动的囚禁破缺及弱相互作用下由简并平带态混合产生的有效磁性。

Topological edge states with ultracold atoms carrying orbital angular momentum in a diamond chain

We study the single-particle properties of a system formed by ultracold atoms loaded into the manifold of $l=1$ Orbital Angular Momentum (OAM) states of an optical lattice with a diamond chain geometry. Through a series of successive basis rotations, we show that the OAM degree of freedom induces phases in some tunneling amplitudes of the tight-binding model that are equivalent to a net $π$ flux through the plaquettes and give rise to a topologically non-trivial band structure and protected edge states. In addition, we demonstrate that quantum interferences between the different tunneling proc…

在超冷原子的平带晶格中工程化拓扑手性输运

Engineering topological chiral transport in a flat-band lattice of ultracold atoms

在超冷原子平带晶格中实验演示了受拓扑保护的态依赖手性输运，通过动量空间菱形链与磁通量调制实现，为量子器件设计提供了拓扑鲁棒性策略。