{
  "id": "1504.02220",
  "version": "v1",
  "published": "2015-04-09T08:04:49.000Z",
  "updated": "2015-04-09T08:04:49.000Z",
  "title": "Storage and retrieval of microwave fields at the single-photon level in a spin ensemble",
  "authors": [
    "C. Grezes",
    "B. Julsgaard",
    "Y. Kubo",
    "W. L. Ma",
    "M. Stern",
    "A. Bienfait",
    "K. Nakamura",
    "J. Isoya",
    "S. Onoda",
    "T. Ohshima",
    "V. Jacques",
    "D. Vion",
    "D. Esteve",
    "R. B. Liu",
    "K. Mølmer",
    "P. Bertet"
  ],
  "comment": "6 pages",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We report the storage of microwave pulses at the single-photon level in a spin-ensemble memory consisting of $10^{10}$ NV centers in a diamond crystal coupled to a superconducting LC resonator. The energy of the signal, retrieved $100\\, \\mu \\mathrm{s}$ later by spin-echo techniques, reaches $0.3\\%$ of the energy absorbed by the spins, and this storage efficiency is quantitatively accounted for by simulations. This figure of merit is sufficient to envision first implementations of a quantum memory for superconducting qubits.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-04-09T08:04:49.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "single-photon level",
      "microwave fields",
      "spin ensemble",
      "envision first implementations",
      "quantum memory"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}