{
  "id": "1405.1132",
  "version": "v1",
  "published": "2014-05-06T02:37:45.000Z",
  "updated": "2014-05-06T02:37:45.000Z",
  "title": "Superradiant Decay of Cyclotron Resonance of Two-Dimensional Electron Gases",
  "authors": [
    "Qi Zhang",
    "Takashi Arikawa",
    "Eiji Kato",
    "John L. Reno",
    "Wei Pan",
    "John D. Watson",
    "Michael J. Manfra",
    "Michael A. Zudov",
    "Michail Tokman",
    "Maria Erukhimova",
    "Alexey Belyanin",
    "Junichiro Kono"
  ],
  "comment": "5 pages, 4 figures",
  "journal": "Physical Review Letters 113, 047601 (2014)",
  "doi": "10.1103/PhysRevLett.113.047601",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We report on the observation of collective radiative decay, or superradiance, of cyclotron resonance (CR) in high-mobility two-dimensional electron gases in GaAs quantum wells using time-domain terahertz magnetospectroscopy. The decay rate of coherent CR oscillations increases linearly with the electron density in a wide range, which is a hallmark of superradiant damping. Our fully quantum mechanical theory provides a universal formula for the decay rate, which reproduces our experimental data without any adjustable parameter. These results firmly establish the many-body nature of CR decoherence in this system, despite the fact that the CR frequency is immune to electron-electron interactions due to Kohn's theorem.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-05-06T02:37:45.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "76.40.+b",
      "73.20.-r",
      "78.47.jh",
      "78.67.De"
    ],
    "keywords": [
      "cyclotron resonance",
      "superradiant decay",
      "decay rate",
      "high-mobility two-dimensional electron gases",
      "time-domain terahertz magnetospectroscopy"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2014,
      "month": "Jul",
      "volume": 113,
      "number": 4,
      "pages": "047601"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2014PhRvL.113d7601Z"
    }
  }
}