{
  "annotation_id": "016728ed-fb95-4147-80e9-0912303258c0",
  "date_created": "2026-03-02T18:02:16.217000Z",
  "date_modified": "2026-03-02T18:02:16.217000Z",
  "file_hash": "7fbf5299905629fd9355f7f9337ab9d6bdc35112b57a4649ae2842056c380424",
  "private": false,
  "record": {
    "abstract": "We propose a method to create superpositions of two macroscopic quantum\nstates of a single-mode microwave cavity field interacting with a\nsuperconducting charge qubit. The decoherence of such superpositions can be\ndetermined by measuring either the Wigner function of the cavity field or the\ncharge qubit states. Then the quality factor Q of the cavity can be inferred\nfrom the decoherence of the superposed states. The proposed method is\nexperimentally realizable within current technology even when the $Q$ value is\nrelatively low, and the interaction between the qubit and the cavity field is\nweak.",
    "arxiv_id": "quant-ph/0506016",
    "authors": [
      "Yu-xi Liu",
      "L. F. Wei",
      "Franco Nori"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.72.033818",
    "journal_ref": "Phys. Rev. A 72, 033818 (2005)",
    "title": "Measuring the quality factor of a microwave cavity using superconduting   qubit devices",
    "url": "https://arxiv.org/abs/quant-ph/0506016"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9297c491-c5e9-4a8e-90f8-a4a6d3738824",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}