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Topological phase in a non-Hermitian PT symmetric system

In this work, we consider a tight binding lattice with two non-Hermitian impurities. The system is described by a non-Hermitian generalization of the Aubry Andre model. We show for the first time that there exists topologically nontrivial edge states with real spectra in the PT symmetric region.

preprint2015arXivOpen access
Cem Yuce
cond-mat.str-elquant-ph
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Cem Yuce

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