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
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发表时间:
2019-09
影响因子:
1.2
通讯作者:
Zhi Song
中科院分区:
文献类型:
--
作者:
Ran Wang;Kun Liang Zhang;Zhi Song
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.
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影响因子:
3.7
作者:
Tong Liu;Hao Guo;Yong Pu;Stefano Longhi
通讯作者:
Stefano Longhi
影响因子:
8.6
作者:
Musslimani, Z. H.;Makris, K. G.;Christodoulides, D. N.
通讯作者:
Christodoulides, D. N.
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
影响因子:
8.6
作者:
Fallani, L.;Lye, J. E.;Inguscio, M.
通讯作者:
Inguscio, M.
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