# Helical resonant transport and purified amplification at an exceptional point

@article{Zhang2019HelicalRT,
title={Helical resonant transport and purified amplification at an exceptional point},
author={K. L. Zhang and L. Jin and Z. Song},
journal={Physical Review B},
year={2019}
}
• Published 30 July 2019
• Physics
• Physical Review B
We propose an application of a parity-time symmetric non-Hermitian Su-Schrieffer-Heeger (SSH) model by embedded it in a two-dimensional square lattice tube. The coalescence state at the exceptional point of non-Hermitian SSH model is chiral and selectively controls helical transport and amplification. Two typical helicity-dependent scattering dynamics are observed. If the incidence has an identical helicity with the embedded non-Hermitian SSH model, we observe a perfect transmission without…
6 Citations

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