We theoretically investigate the eigenenergies of coupled Su-Schrieffer-Heeger (SSH) chains with ##IMG## [http://ej.iop.org/images/1402-4896/95/11/115801/psabbbcdieqn3.gif] {${ \mathcal P }{ \mathcal T }$} -symmetric imaginary potentials. It is found that the direct coupling between two SSH chains leads to the splitting of the topological edge states accompanied by the destruction of their original natures. If the two SSH chains are indirectly coupled via an impurity, additional nontopological isolated states are allowed to come up. Next when the ##IMG## [http://ej.iop.org/images/1402-4896/95/11/115801/psabbbcdieqn4.gif] {${ \mathcal P }{ \mathcal T }$} -symmetric potentials are incorporated, the topological zero-energy states undergo the simple ##IMG## [http://ej.iop.org/images/1402-4896/95/11/115801/psabbbcdieqn5.gif] {${ \mathcal P }{ \mathcal T }$} -symmetry breaking. However, the nontopological isolated states e...

中文翻译：

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具有## IMG ##的Su-Schrieffer-Heeger耦合链的能谱[http://ej.iop.org/images/1402-4896/95/11/115801/toc_psabbbcdieqn1.gif] {$ {\ mathcal P} {\ mathcal T} $}-对称虚边界电位

我们从理论上研究了## IMG ## [http://ej.iop.org/images/1402-4896/95/11/115801/psabbbcdieqn3.gif]耦合的Su-Schrieffer-Heeger（SSH）链的本征能{ $ {\ mathcal P} {\ mathcal T} $}-对称的虚构电势。发现两条SSH链之间的直接耦合会导致拓扑边缘状态分裂，并破坏其原始性质。如果两条SSH链通过杂质间接耦合，则允许出现其他非拓扑隔离状态。接下来，当## IMG ## [http://ej.iop.org/images/1402-4896/95/11/115801/psabbbcdieqn4.gif] {$ {\ mathcal P} {\ mathcal T} $}-对称电势被合并，拓扑零能量状态经历简单的## IMG ## [http://ej.iop.org/images/1402-4896/95/11/115801/psabbbcdieqn5。gif] {$ {\ mathcal P} {\ mathcal T} $}-对称破缺。但是，非拓扑孤立状态导致...