arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.06635cond-mat.str-el
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圆盘几何中非阿贝尔分数Chern绝缘子

Non-Abelian Fractional Chern Insulator in Disk Geometry

Ai-Lei He, Wei-Wei Luo, Hong Yao, Yi-Fei Wang

摘要:

准粒子服从NA编织统计的非阿贝尔(NA)分数拓扑态由于其基本性质和在拓扑量子计算中的应用前景而受到人们的广泛关注。到目前为止,已经提出了许多实现NA分数拓扑态的模型,例如著名的Moore-Read量子Hall态和非阿贝尔分数Chern绝缘体(NA-FCI)。在这里,我们调查的NA-FCI在磁盘几何与三体硬核玻色子加载到一个拓扑平坦带。这种稳定的$ν= 1$玻色子NA-FCI的特征在于边缘激发和基态角动量。基于广义泡利原理和Jack多项式,我们成功地构造了NA-FCI的试探波函数。此外,随着在位相互作用的增加,出现了一个$ν= 1/2$阿贝尔FCI态,它也可以用试探波函数来识别。我们的研究结果不仅为NA-FCI找到了一个最佳的波函数,而且为进一步研究成对拓扑态提供了一种有效的方法。

英文摘要:

Non-Abelian (NA) fractional topological states with quasi-particles obeying NA braiding statistics have attracted intensive attentions for both its fundamental nature and the prospect for topological quantum computation. To date, there are many models proposed to realize the NA fractional topological states, such as the well-known Moore-Read quantum Hall states and the Non-Abelian fractional Chern insulators (NA-FCIs). Here, we investigate the NA-FCI in disk geometry with three-body hard-core bosons loaded into a topological flat band. This stable $ν= 1$ bosonic NA-FCI is characterized by the edge excitations and the ground-state angular momentum. Based on the generalized Pauli principle and the Jack polynomials, we successfully construct a trial wave function for the NA-FCI. Moreover, a $ν= 1/2$ Abelian FCI state emerges with the increase of the on-site interaction and it can be identified with the help of the trial wave function as well. Our findings not only lead to an optimal wave function for the NA-FCI, but also directly provide an effective approach for future researches on paired topological states.

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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