{
  "id": "2304.05748",
  "version": "v1",
  "published": "2023-04-12T10:05:02.000Z",
  "updated": "2023-04-12T10:05:02.000Z",
  "title": "Topological Monomodes in non-Hermitian Systems",
  "authors": [
    "E. Slootman",
    "W. Cherifi",
    "L. Eek",
    "R. Arouca",
    "M. Bourennane",
    "C. Morais Smith"
  ],
  "comment": "16 pages, 12 figures, comments are welcome",
  "categories": [
    "cond-mat.mes-hall",
    "physics.optics",
    "quant-ph"
  ],
  "abstract": "We show theoretically and experimentally the existence of topological monomodes in non-Hermitian systems created by loss engineering. This challenges the idea that edge states always come in pairs in $\\mathbb{Z}_2$ symmetry-protected topological systems. We theoretically show the existence of a monomode in a non-Hermitian 1D and 2D SSH models. Furthermore, we classify the systems in terms of the (non-Hermitian) symmetries that are present and calculate the corresponding topological invariant. To corroborate the theory, we present experiments in photonic lattices in which a monomode is observed in a non-Hermitian 1D SSH chain.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-04-12T10:05:02.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "non-hermitian systems",
      "topological monomodes",
      "non-hermitian 1d ssh chain",
      "2d ssh models",
      "edge states"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}