Nature Communications (Sep 2021)

Quantized classical response from spectral winding topology

  • Linhu Li,
  • Sen Mu,
  • Ching Hua Lee,
  • Jiangbin Gong

DOI
https://doi.org/10.1038/s41467-021-25626-z
Journal volume & issue
Vol. 12, no. 1
pp. 1 – 11

Abstract

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Quantized response has so far eluded classical system beyond linear response theory. Here, the authors predict that a quantized classical response, arising from fundamental mathematical properties of the Green’s function, shows up in steady-state response of a non-Hermitian system without invoking a linear response theory.