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arXiv 1606.03532cond-mat.str-elcond-mat.mes-hall
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分数阶量子霍尔边缘模的密度振荡识别

Identification of the Fractional quantum Hall edge modes by density oscillations

Na Jiang, Zi-Xiang Hu

摘要:

中性费米子边缘模是$k > 1$的$Z_k$分数量子霍尔态的非阿贝尔拓扑性质及其实验检测的基础。通常,在有限尺寸系统中识别边缘模式是困难的,特别是在边缘重建区域附近,由于与玻色边缘模式和体态混合。利用截断子空间中的Jack多项式研究了Moore-Read(MR)和Read-Rezayi(RR)态的边模激发。结果表明,作为探测器的电子密度在玻色子边缘模和费米子边缘模之间具有明显不同的行为。作为一个应用,它帮助我们识别边缘重建附近和RR边缘谱。另一方面,我们系统地研究了RR态的边缘激发,外推了干涉仪实验中的边缘速度及其相关的相干长度和温度。

英文摘要:

The neutral fermionic edge mode is essential to the non-Abelian topological property and its experimental detection in $Z_k$ fractional quantum Hall (FQH) state for $k > 1$. Usually, the identification of the edge modes in a finite size system is difficult, especially near the region of the edge reconstruction, due to mixing with the bosonic edge mode and the bulk states as well. We study the edge-mode excitations of the Moore-Read (MR) and Read-Rezayi (RR) states by using Jack polynomials in the truncated subspace. It is found that the electron density, as a detector, has marked different behaviors between the bosonic and fermionic edge modes. As an application, it helps us to identify them near the edge reconstruction and in the RR edge spectrum. On the other hand, we systematically study the edge excitations for the RR state, extrapolate the edge velocities and their related coherence length and temperature in the interferometer experiments.

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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