{
  "annotation_id": "1acccffc-b630-410c-a7f6-69bc97478e80",
  "date_created": "2026-03-02T18:02:20.418000Z",
  "date_modified": "2026-03-02T18:02:20.418000Z",
  "file_hash": "5d92a651dace99c7bed0eeff89723063ccd4db8425cee98abfb4e53286d02801",
  "private": false,
  "record": {
    "abstract": "We present a scheme for a projective measurement of the parity operator\n$P_z=\\prod_{i=1}^N \\sigma_z^{(i)}$ of $N$-qubits. Our protocol uses a single\nancillary qubit, or a probe qubit, and involves manipulations of the total spin\nof the $N$ qubits without requiring individual addressing. We illustrate our\nprotocol in terms of an experimental implementation with atomic ions in a\ntwo-zone linear Paul trap, and further discuss its extensions to several more\ngeneral cases.",
    "arxiv_id": "quant-ph/0508048",
    "authors": [
      "B. Zeng",
      "D. L. Zhou",
      "L. You"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.95.110502",
    "title": "Measuring the parity of an $N$-qubit state",
    "url": "https://arxiv.org/abs/quant-ph/0508048"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "606d6c29-2e4f-43cc-aa0e-2a83cd542e60",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}