{
  "annotation_id": "190d0c8b-9314-410e-b773-a19bd61084ea",
  "date_created": "2026-03-02T18:02:16.527000Z",
  "date_modified": "2026-03-02T18:02:16.527000Z",
  "file_hash": "0fd439d9ff01da493327737f152daebe29bcf1a5695f5177097246364096165e",
  "private": false,
  "record": {
    "abstract": "We propose a physically reversible quantum measurement of an arbitrary spin-s\nsystem using a spin-j probe via an Ising interaction. In the case of a spin-1/2\nsystem (s=1/2), we explicitly construct a reversing measurement and evaluate\nthe degree of reversibility in terms of fidelity. The recovery of the measured\nstate is pronounced when the probe has a high spin (j\u003e1/2), because the\nfidelity changes drastically during the reversible measurement and the\nreversing measurement. We also show that the reversing measurement scheme for a\nspin-1/2 system can serve as an experimentally feasible approximate reversing\nmeasurement for a high-spin system (s\u003e1/2). If the interaction is sufficiently\nweak, the reversing measurement can recover a cat state almost\ndeterministically in spite of there being a large fidelity change.",
    "arxiv_id": "quant-ph/0507020",
    "authors": [
      "Hiroaki Terashima",
      "Masahito Ueda"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.74.012102",
    "journal_ref": "Phys.Rev. A74 (2006) 012102",
    "title": "Reversible quantum measurement with arbitrary spins",
    "url": "https://arxiv.org/abs/quant-ph/0507020"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "94bb0c78-2014-4ad9-a565-55f92021794f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}