{
  "id": "1905.06194",
  "version": "v1",
  "published": "2019-05-15T13:58:07.000Z",
  "updated": "2019-05-15T13:58:07.000Z",
  "title": "Theory of double Cooper-pair tunneling and light emission mediated by a resonator",
  "authors": [
    "W. T. Morley",
    "A. Di Marco",
    "M. Mantovani",
    "P. Stadler",
    "W. Belzig",
    "G. Rastelli",
    "A. D. Armour"
  ],
  "categories": [
    "cond-mat.mes-hall",
    "quant-ph"
  ],
  "abstract": "Photon emission by tunneling electrons can be encouraged by locating a resonator close to the tunnel junction and applying an appropriate voltage-bias. However, studies of normal metals show that the resonator also affects how the charges flow, facilitating processes in which correlated tunneling of two charges produces one photon. We develop a theory to analyze this kind of behavior in Josephson junctions by deriving an effective Hamiltonian describing processes where two Cooper-pairs generate a single photon. We determine the conditions under which the transport is dominated by incoherent tunneling of two Cooper-pairs, whilst also uncovering a regime of coherent double Cooper-pair tunneling. We show that the system can also display an unusual form of photon-blockade and hence could serve as a single-photon source.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-05-15T13:58:07.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "double cooper-pair tunneling",
      "light emission",
      "single-photon source",
      "unusual form",
      "resonator close"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}