{
  "id": "1912.12156",
  "version": "v1",
  "published": "2019-12-27T15:29:37.000Z",
  "updated": "2019-12-27T15:29:37.000Z",
  "title": "Quantum Theory of Multisubband Plasmon-Phonon Coupling",
  "authors": [
    "Sofia Ribeiro",
    "Angela Vasanelli",
    "Yanko Todorov",
    "Carlo Sirtori"
  ],
  "comment": "12 pages, 4 figures",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.quant-gas",
    "quant-ph"
  ],
  "abstract": "We present a theoretical description of the coupling between longitudinal optical phonons and collective excitations of a two-dimensional electron gas. By diagonalizing the Hamiltonian of the system, including Coulomb electron-electron and Fr\\\"ohlich interactions, we observe the formation of multisubband polarons, mixed states partially phonon and partially multisubband plasmon, characterized by a coupling energy which is a significant fraction, up to ~40%, of the phonon energy. We demonstrate that multisubband plasmons and longitudinal optical phonons are in the ultra-strong coupling regime in several III-V and II-VI material systems.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-12-27T15:29:37.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "multisubband plasmon-phonon coupling",
      "quantum theory",
      "longitudinal optical phonons",
      "ii-vi material systems",
      "two-dimensional electron gas"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}