{
  "annotation_id": "51615173-19a9-4828-8da9-73a8660b5a12",
  "date_created": "2026-03-02T18:02:06.806000Z",
  "date_modified": "2026-03-02T18:02:06.806000Z",
  "file_hash": "633b86bb8b629345c3a047a3051123a8addf6043ad7a6805ec0f48e6c71ca781",
  "private": false,
  "record": {
    "abstract": "We show that the U(2) family of point interactions on a line can be utilized\nto provide the U(2) family of qubit operations for quantum information\nprocessing. Qubits are realized as localized states in either side of the point\ninteraction which represents a controllable gate. The manipulation of qubits\nproceeds in a manner analogous to the operation of an abacus.\n  Keywords: quantum computation, quantum contact interaction, quantum wire",
    "arxiv_id": "quant-ph/0404039",
    "authors": [
      "Taksu Cheon",
      "Izumi Tsutsui",
      "Tamas Fulop"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.mes-hall",
      "math-ph",
      "math.MP"
    ],
    "doi": "10.1016/j.physleta.2004.08.011",
    "journal_ref": "Physics Letters A330 (2004) 338-342",
    "title": "Quantum Abacus",
    "url": "https://arxiv.org/abs/quant-ph/0404039"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ef47d42b-c371-45dd-8a47-174a4f8cd7a7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}