{
  "annotation_id": "59b93419-a580-4c79-a1fd-26340ec03d85",
  "date_created": "2026-03-02T18:02:24.072000Z",
  "date_modified": "2026-03-02T18:02:24.072000Z",
  "file_hash": "7b1a651d505535da0de29363f4a3313a6bb73f98fd1091cdc9e6481dfb13c2cf",
  "private": false,
  "record": {
    "abstract": "We propose an experimental procedure to directly measure the state of an\nelectromagnetic field inside a resonator, corresponding to a superconducting\ntransmission line, coupled to a Cooper-pair box (CPB). The measurement protocol\nis based on the use of a dispersive interaction between the field and the CPB,\nand the coupling to an external classical field that is tuned to resonance with\neither the field or the CPB. We present a numerical simulation that\ndemonstrates the feasibility of this protocol, which is within reach of present\ntechnology.",
    "arxiv_id": "quant-ph/0602195",
    "authors": [
      "F. de Melo",
      "L. Aolita",
      "F. Toscano",
      "L. Davidovich"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.supr-con"
    ],
    "doi": "10.1103/PhysRevA.73.030303",
    "journal_ref": "Phys. Rev. A 73, 030303(R) (2006)",
    "title": "Direct measurement of the quantum state of the electromagnetic field in   a superconducting transmission line",
    "url": "https://arxiv.org/abs/quant-ph/0602195"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "13b96faf-11d1-4126-883a-36046ba9a416",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}