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arxiv: 1902.08610 · v1 · pith:QINGUJPGnew · submitted 2019-02-21 · ❄️ cond-mat.mes-hall · cond-mat.str-el· physics.optics· quant-ph

Spontaneous topological pumping in non-Hermitian systems

classification ❄️ cond-mat.mes-hall cond-mat.str-elphysics.opticsquant-ph
keywords systemstopologicaledgenon-hermitianpumpingstateconversioncontrast
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We introduce modulational instability in non-Hermitian systems to study state conversion of topological edge states. We show that state conversion in non-Hermitian systems leads to topological pumping, which is a way of transferring topological edge state from one edge to the opposite edge. In contrast to Hermitian systems, topological pumping can occur spontaneously in non-Hermitian systems.

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