arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2002.05565cond-mat.str-el
收藏

分数量子霍尔液体中普适几何响应的微观诊断

Microscopic Diagnosis of Universal Geometric Responses in Fractional Quantum Hall Liquids

Liangdong Hu, Zhao Liu, D. N. Sheng, F. D. M. Haldane, W. Zhu

摘要:

拓扑量子液体包含耦合到几何响应的内部自由度。然而,一个明确的和微观的几何响应识别仍然很困难。本文以分数量子霍尔(Fractional Quantum Hall,HALL)态为例,系统地研究了一种很有前途的方案--环面几何上的Dehn扭曲变形,以探索相关拓扑态的几何响应,并建立了这种响应与相关态的普适性质之间的关系.基于解析推导和数值模拟,我们发现几何诱导的Berry相位在Laughlin,hierarchy,Halperin和非Abelian Moore-Read填充下编码了一大类具有新颖特征的量子态.我们的研究结果表明,绝热Dehn扭曲变形可以忠实地捕捉到基本的DOH液滴的几何结构和包括拓扑自旋和手征中心荷在内的固有模信息.我们的方法提供了一个强大的方法来揭示拓扑秩序的通用的BROH状态,并允许我们解决以前的开放问题。

英文摘要:

Topological quantum liquids contain internal degrees of freedom that are coupled to geometric response. Yet, an explicit and microscopic identification of geometric response remains difficult. Here, taking notable fractional quantum Hall (FQH) states as typical examples, we systematically investigate a promising protocol -- the Dehn twist deformation on the torus geometry, to probe the geometric response of correlated topological states and establish the relation between such response and the universal properties of pertinent states. Based on analytical derivations and numerical simulations, we find that the geometry-induced Berry phase encodes novel features for a broad class of FQH states at the Laughlin, hierarchy, Halperin and non-Abelian Moore-Read fillings. Our findings conclusively demonstrate that the adiabatic Dehn twist deformation can faithfully capture the geometry of elementary FQH droplets and intrinsic modular information including topological spin and chiral central charge. Our approach provides a powerful way to reveal topological orders of generic FQH states and allows us to address previously open questions.

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。

↑