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arXiv 1802.09183cond-mat.quant-gas
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泵浦光腔中的合成拓扑Kondo绝缘体

Synthetic topological Kondo insulator in a pumped optical cavity

Zhen Zheng, Xu-Bo Zou, Guang-Can Guo

摘要:

受超冷原子与泵浦光腔耦合实验进展的启发,我们提出了一个在光晶格中囚禁费米气体中合成和观察近藤绝缘体的方案。合成近藤相产生于与移动原子耦合的局域原子的屏蔽,在我们的建议中,这是通过泵浦激光器以及腔产生的。通过设计原子-腔耦合,可以设计出最近邻位的近藤耦合,这种近藤耦合对于支持拓扑近藤相位起着至关重要的作用。因此,腔诱导的近藤跃迁与非平凡的拓扑特征相关联,导致超辐射和拓扑近藤态共存。我们的方案可以在现有技术条件下实现,因此在超冷原子中拓扑近藤绝缘体的量子模拟中具有潜在的应用价值。

英文摘要:

Motivated by experimental advances on ultracold atoms coupled to a pumped optical cavity, we propose a scheme for synthesizing and observing the Kondo insulator in Fermi gases trapped in optical lattices. The synthetic Kondo phase arises from the screening of localized atoms coupled to mobile ones, which in our proposal is generated via the pumping laser as well as the cavity. By designing the atom-cavity coupling, it can engineer a nearest-neighbor-site Kondo coupling that plays an essential role for supporting topological Kondo phase. Therefore, the cavity-induced Kondo transition is associated with a nontrivial topological features, resulting in the coexistence of the superradiant and topological Kondo state. Our proposal can be realized with current technique, and thus has potential applications in quantum simulation of the topological Kondo insulator in ultracold atoms.

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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