{
  "annotation_id": "403c0f59-0ca3-4bd4-b81a-d4bfd9093f0d",
  "date_created": "2026-03-02T18:01:56.059000Z",
  "date_modified": "2026-03-02T18:01:56.059000Z",
  "file_hash": "95cea5ec6d5c4f4c9d7cc87ee4cbd50bdec0df2090457a9315160404a3aebbf2",
  "private": false,
  "record": {
    "abstract": "The zero-voltage state of a Josephson junction biased with constant current\nconsists of a set of metastable quantum energy levels. We probe the spacings of\nthese levels by using microwave spectroscopy to enhance the escape rate to the\nvoltage state. The widths of the resonances give a measurement of the coherence\ntime of the two states involved in the transitions. We observe a decoherence\ntime shorter than that expected from dissipation alone in resonantly isolated\n20 um x 5 um Al/AlOx/Al junctions at 60 mK. The data is well fit by a model\nincluding dephasing effects of both low-frequency current noise and the escape\nrate to the continuum voltage states. We discuss implications for quantum\ncomputation using current-biased Josephson junction qubits, including the\nminimum number of levels needed in the well to obtain an acceptable error limit\nper gate.",
    "arxiv_id": "quant-ph/0303001",
    "authors": [
      "A. J. Berkley",
      "H. Xu",
      "M. A. Gubrud",
      "R. C. Ramos",
      "J. R. Anderson",
      "C. J. Lobb",
      "F. C. Wellstood"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevB.68.060502",
    "title": "Decoherence in a Josephson junction qubit",
    "url": "https://arxiv.org/abs/quant-ph/0303001"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9ba36ed6-36f0-427c-bb6e-2fbf8ab121e2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}