Floquet engineering of topological localization transitions and mobility edges in one-dimensional non-Hermitian quasicrystals
Floquet engineering of topological localization transitions and mobility edges in one-dimensional non-Hermitian quasicrystals
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一维非厄米准晶拓扑局部化跃迁和迁移边缘的Floquet工程
DOI:
10.1103/physrevresearch.3.033184
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发表时间:
2021-06
影响因子:
4.2
通讯作者:
Zhou Longwen
中科院分区:
文献类型:
--
作者:
Zhou Longwen
Time-periodic driving fields could endow a system with peculiar topological and transport features. In this work, we find dynamically controlled localization transitions and mobility edges in non-Hermitian quasicrystals via shaking the lattice periodically. The driving force dresses the hopping amplitudes between lattice sites, yielding alternate transitions between localized, mobility edge and extended non-Hermitian quasicrystalline phases. We apply our Floquet engineering approach to five representative models of non-Hermitian quasicrystals, obtain the conditions of photon-assisted localization transitions and mobility edges, and find the expressions of Lyapunov exponents for some models. We further introduce topological winding numbers of Floquet quasienergies to distinguish non-Hermitian quasicrystalline phases with different localization nature. Our discovery thus extend the study of quasicrystals to non-Hermitian Floquet systems, and provide an efficient way of modulating the topological and transport properties of these unique phases.
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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:
V. V. Ivanov-V.;A. Alberti;M. Schioppo;G. Ferrari;M. Artoni;M. Chiofalo;G. Tino
通讯作者:
V. V. Ivanov-V.;A. Alberti;M. Schioppo;G. Ferrari;M. Artoni;M. Chiofalo;G. Tino
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:
3.7
作者:
S. Longhi
通讯作者:
S. Longhi
影响因子:
3.7
作者:
S. Longhi
通讯作者:
S. Longhi