{
  "annotation_id": "b6ca4d4b-8efa-4ed9-9c8f-38997b5139a1",
  "date_created": "2026-03-02T18:02:06.402000Z",
  "date_modified": "2026-03-02T18:02:06.402000Z",
  "file_hash": "6c95d7e7698a038de903e792110d88f40073dda74fad447b3fca9793d562776f",
  "private": false,
  "record": {
    "abstract": "We used quantum process tomography to investigate and identify the function\nof a nonideal two-qubit quantum-state filters subject to various degree of\ndecoherence. We present a simple decoherence model that explains the\nexperimental results and point out that a beamsplitter followed by a\npost-selection process is not, as commonly believed, a singlet-state filter. In\nthe ideal case it is a triplet-state filter.",
    "arxiv_id": "quant-ph/0405073",
    "authors": [
      "Yoshihiro Nambu",
      "Kazuo Nakamura"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.94.010404",
    "title": "Experimental Investigation of Nonideal Two-qubit Quantum-state Filter by   Quantum Process Tomography",
    "url": "https://arxiv.org/abs/quant-ph/0405073"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c2c6059e-3a41-4c1e-9770-40756e8dc6e3",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}