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Topologically protected defect states in open photonic systems with non-Hermitian charge-conjugation and parity-time symmetry

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Topologically protected defect states in open photonic systems with non-Hermitian charge-conjugation and parity-time symmetry. / Malzard, Simon; Poli, Charles Joseph; Schomerus, Henning Ulrich.

In: Physical review letters, Vol. 115, No. 20, 200402, 13.11.2015.

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@article{7cfb1b1899d04a91b3fda510e389e8a1,
title = "Topologically protected defect states in open photonic systems with non-Hermitian charge-conjugation and parity-time symmetry",
abstract = "We show that topologically protected defect states can exist in open (leaky or lossy) systems even when these systems are topologically trivial in the closed limit. The states appear from within the continuum, thus in the absence of a band gap, and are generated via exceptional points (a spectral transition that occurs in open wave and quantum systems with a generalized time-reversal symmetry), or via a degeneracy induced by charge-conjugation symmetry (which is related to the pole transition of Majorana zero modes). We demonstrate these findings for a leaking passive coupled-resonator optical waveguide with asymmmetric internal scattering, where the required symmetries (non-Hermitian versions of time-reversal symmetry, chirality, and charge conjugation) emerge dynamically.",
author = "Simon Malzard and Poli, {Charles Joseph} and Schomerus, {Henning Ulrich}",
year = "2015",
month = nov,
day = "13",
doi = "10.1103/PhysRevLett.115.200402",
language = "English",
volume = "115",
journal = "Physical review letters",
issn = "1079-7114",
publisher = "American Physical Society",
number = "20",

}

RIS

TY - JOUR

T1 - Topologically protected defect states in open photonic systems with non-Hermitian charge-conjugation and parity-time symmetry

AU - Malzard, Simon

AU - Poli, Charles Joseph

AU - Schomerus, Henning Ulrich

PY - 2015/11/13

Y1 - 2015/11/13

N2 - We show that topologically protected defect states can exist in open (leaky or lossy) systems even when these systems are topologically trivial in the closed limit. The states appear from within the continuum, thus in the absence of a band gap, and are generated via exceptional points (a spectral transition that occurs in open wave and quantum systems with a generalized time-reversal symmetry), or via a degeneracy induced by charge-conjugation symmetry (which is related to the pole transition of Majorana zero modes). We demonstrate these findings for a leaking passive coupled-resonator optical waveguide with asymmmetric internal scattering, where the required symmetries (non-Hermitian versions of time-reversal symmetry, chirality, and charge conjugation) emerge dynamically.

AB - We show that topologically protected defect states can exist in open (leaky or lossy) systems even when these systems are topologically trivial in the closed limit. The states appear from within the continuum, thus in the absence of a band gap, and are generated via exceptional points (a spectral transition that occurs in open wave and quantum systems with a generalized time-reversal symmetry), or via a degeneracy induced by charge-conjugation symmetry (which is related to the pole transition of Majorana zero modes). We demonstrate these findings for a leaking passive coupled-resonator optical waveguide with asymmmetric internal scattering, where the required symmetries (non-Hermitian versions of time-reversal symmetry, chirality, and charge conjugation) emerge dynamically.

U2 - 10.1103/PhysRevLett.115.200402

DO - 10.1103/PhysRevLett.115.200402

M3 - Journal article

VL - 115

JO - Physical review letters

JF - Physical review letters

SN - 1079-7114

IS - 20

M1 - 200402

ER -