{
  "annotation_id": "07d7e9a0-02ba-4547-8aee-a0d1c988b9f8",
  "date_created": "2026-03-02T18:02:10.014000Z",
  "date_modified": "2026-03-02T18:02:10.014000Z",
  "file_hash": "ec6e0b34f25fe47b9e588a780a96db09edc72ac00189817a5b6ecdd23fb5f705",
  "private": false,
  "record": {
    "abstract": "The influence of decoherence on the fidelity of quantum memories for photonic\nqubits based on dark-state polaritons in atomic ensembles is discussed. It is\nshown that despite the large entanglement of the collective storage states\ncorresponding to single photons or nonclassical states of light the sensitivity\nto decoherence does not scale with the number of atoms. This is due to the\nexistence of equivalence classes of storage states corresponding to states with\nthe same number of dark-state polariton excitations but arbitrary excitations\nin other polariton modes. Several decoherence processes are discussed in\ndetail: single-atom spin-flips and dephasing, atom loss and motion of atoms.",
    "arxiv_id": "quant-ph/0408018",
    "authors": [
      "Claudia Mewes",
      "Michael Fleischhauer"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.72.022327",
    "title": "Decoherence in collective quantum memories for photons",
    "url": "https://arxiv.org/abs/quant-ph/0408018"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "698a88fe-443d-475d-aff6-c035531a97df",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}