Anderson localization induced by complex potential

Anderson localization induced by complex potential
复制标题

复势诱导的安德森定位

DOI:
10.1088/2399-6528/ac261f
复制
发表时间:
2019-09
影响因子:
1.2
通讯作者:
Zhi Song
Zhi Song
中科院分区:
--
文献类型:
--
作者:
Ran Wang;Kun Liang Zhang;Zhi Song

文献摘要

参考文献

被引文献

相似文献

在厄米状态下,一维晶格中的不相关无序势可以诱导安德森局域化,而准周期势可以根据势的强度导致局域化和扩展相。在这项研究中,我们研究了非厄米状态。本文对一维晶格中具有非厄米复无序和准周期势的安德森局域化问题进行了解析和数值研究。我们给出了一个非厄米的Su-Schrieffer-Heeger (SSH)链,并证明了具有全实谱的厄米对应物是一个标准Anderson链,这表明非零虚无序场势可以诱导标准Anderson局域化。我们进一步证明了非厄米aubry - andr<s:1> -Harper (AAH)模型在参数空间中表现出一个过渡,该过渡分离了局部化和非局部化阶段,并由模型的自对偶决定。这表明在局域和离域的过渡点上,纯虚拟周期势与实拟周期势起着相同的作用。值得注意的是,具有复杂准周期势的系统在过渡点上表现出类似干涉的图样,这是由实分量和虚分量之间的相互作用引起的。
In the Hermitian regime, uncorrelated disorder potential in one-dimensional lattice induces Anderson localization, whereas quasiperiodic potential can lead to both localized and extended phases, depending on the potential strength. In this study, we investigate the non-Hermitian regime. We analytically and numerically study Anderson localization in a one-dimensional lattice with the non-Hermitian complex disorder and quasiperiodic potential. We present a non-Hermitian Su-Schrieffer-Heeger (SSH) chain and demonstrate that the Hermitian counterpart with full real spectrum is a standard Anderson chain, which indicates that a nonzero imaginary disorder on-site potential can induce standard Anderson localization. We further demonstrate that the non-Hermitian Aubry-André -Harper (AAH) model exhibits a transition in parameter space, which separates the localization and delocalization phases and is determined by the self-duality of the model. This indicates that a pure imaginary quasiperiodic potential plays the same role as a real quasiperiodic potential in the transition point between localization and delocalization. Notably, a system with complex quasiperiodic potential exhibits an interference-like pattern on the transition points, which arises from the interplay between the real and imaginary components.
DOI: 10.1103/physrevlett.98.130404
发表时间: 2007-03-30
影响因子: 8.6
作者:
Fallani, L.;Lye, J. E.;Inguscio, M.
通讯作者: Inguscio, M.
DOI: 10.1016/0370-1573(85)90088-2
发表时间: 1985-09
期刊: Physics Reports
影响因子: --
作者:
J. Sokoloff
通讯作者: J. Sokoloff
DOI: 10.1088/0305-4470/39/32/s18
发表时间: 2005-08
期刊: Journal of Physics A
影响因子: --
作者:
A. Mostafazadeh
通讯作者: A. Mostafazadeh
非厄米准周期晶格中的广义奥布里-安德烈自对偶性和迁移边
DOI: 10.1103/physrevb.102.024205
发表时间: 2020-07
期刊: Physical Review B
影响因子: 3.7
作者:
Tong Liu;Hao Guo;Yong Pu;Stefano Longhi
通讯作者: Stefano Longhi
DOI: 10.1103/physrevlett.100.030402
发表时间: 2008-01-25
影响因子: 8.6
作者:
Musslimani, Z. H.;Makris, K. G.;Christodoulides, D. N.
通讯作者: Christodoulides, D. N.