{
  "id": "1907.01016",
  "version": "v1",
  "published": "2019-07-01T18:51:47.000Z",
  "updated": "2019-07-01T18:51:47.000Z",
  "title": "Topological edge states of interacting photon pairs realized in a topolectrical circuit",
  "authors": [
    "Nikita A. Olekhno",
    "Egor I. Kretov",
    "Andrey A. Stepanenko",
    "Dmitry S. Filonov",
    "Vitaly V. Yaroshenko",
    "Barbara Cappello",
    "Ladislau Matekovits",
    "Maxim A. Gorlach"
  ],
  "comment": "7 pages, 3 figures+Supplementary",
  "categories": [
    "cond-mat.mes-hall",
    "physics.optics",
    "quant-ph"
  ],
  "abstract": "Topolectrical circuits have recently emerged as a simple yet very useful platform for a tabletop realization of topological physics. Employing this platform, we capture an intriguing physics of two-photon topological states in quantum regime going beyond well-celebrated topological states of classical light. Besides their quantum nature, investigated two-photon states also exhibit an interaction-induced origin, elucidating the interplay between quantum entanglement and interactions. In our experiments, we extract the frequencies of bulk and edge two-photon bound states and evaluate the associated topological invariant directly from the measurements. To further enhance our findings, we perform a reconstruction of the two-photon probability distribution for the topological state. Our results shed light onto the topological protection in interacting quantum-optical systems opening further perspectives for applications in quantum communication and quantum computations.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-07-01T18:51:47.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "topological edge states",
      "interacting photon pairs",
      "topolectrical circuit",
      "topological state",
      "edge two-photon bound states"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}