{
  "annotation_id": "7a05dd58-4a3f-4217-9bda-6c1a68a717f9",
  "date_created": "2026-03-02T18:02:15.899000Z",
  "date_modified": "2026-03-02T18:02:15.899000Z",
  "file_hash": "b908bbe6b842817b317d44bd75f711267f6c2c7aadcfebbb55c41fe50371a58f",
  "private": false,
  "record": {
    "abstract": "We prove that universal quantum computation is possible using only (i) the\nphysically natural measurement on two qubits which distinguishes the singlet\nfrom the triplet subspace, and (ii) qubits prepared in almost any three\ndifferent (potentially highly mixed) states. In some sense this measurement is\na `more universal\u0027 dynamical element than a universal 2-qubit unitary gate,\nsince the latter must be supplemented by measurement. Because of the rotational\ninvariance of the measurement used, our scheme is robust to collective\ndecoherence in a manner very different to previous proposals - in effect it is\nonly ever sensitive to the relational properties of the qubits.",
    "arxiv_id": "quant-ph/0503151",
    "authors": [
      "Terry Rudolph",
      "Shashank Soyuz Virmani"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/1367-2630/7/1/228",
    "title": "A relational quantum computer using only two-qubit total spin   measurement and an initial supply of highly mixed single qubit states",
    "url": "https://arxiv.org/abs/quant-ph/0503151"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "88aeef82-eebe-4368-a9cb-77b07e9b592e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}