论文标题

在三维Wigner-Dyson对称性类中,由准碘潜力驱动的安德森过渡的通用类别类别

Universality classes of the Anderson transitions driven by quasiperiodic potential in the three-dimensional Wigner-Dyson symmetry classes

论文作者

Luo, Xunlong, Ohtsuki, Tomi

论文摘要

Quasiperiodic系统是由准碘势(QP)驱动的独特定位定位转变的周期性和无序系统之间的中间状态。有趣的问题之一是,由QP驱动的安德森过渡(AT)的通用类别是否类似于同一对称类别中随机电位驱动的通用类别。在这里,我们研究了属于Wigner-Dyson对称类别的三维(3D)Anderson模型,PEIERLS相模型和Ando模型中QP驱动的ATS的临界行为。通过转移矩阵方法计算了定位长度和两末端电导,我们认为它们的统计数据误差估计受QP的相关性。通过控制的相关性,由QP驱动的ATS的关键指数$ν$由有限的电导尺寸缩放分析估算,这与随机电位驱动的ATS $ν$一致。此外,已经研究了关键电导分布和水平间距比分布。我们还发现,无序系统中的局部/离域波函数训练的卷积神经网络预测了准膜膜系统中的局部/DELAICALIZED波函数。我们的数值结果强烈支持,在3D Wigner-Dyson对称类别中,由QP驱动的ATS和随机势相似。

Quasiperiodic system is an intermediate state between periodic and disordered systems with unique delocalization-localization transition driven by the quasiperiodic potential (QP). One of the intriguing questions is whether the universality class of the Anderson transition (AT) driven by QP is similar to that of the AT driven by the random potential in the same symmetry class. Here, we study the critical behavior of the ATs driven by QP in the three-dimensional (3D) Anderson model, Peierls phase model, and Ando model, which belong to the Wigner-Dyson symmetry classes. The localization length and two-terminal conductance have been calculated by the transfer matrix method, and we argue that their error estimations in statistics suffer from the correlation of QP. With the correlation under control, the critical exponents $ν$ of the ATs driven by QP are estimated by the finite size scaling analysis of conductance, which are consistent with $ν$'s of the ATs driven by the random potential. Moreover, the critical conductance distribution and the level spacing ratio distribution have been studied. We also find that a convolutional neural network trained by the localized/delocalized wavefunctions in a disordered system predicts the localized/delocalized wavefunctions in quasiperiodic systems. Our numerical results strongly support that the universality classes of the ATs driven by QP and random potential are similar in the 3D Wigner-Dyson symmetry classes.

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