{
  "annotation_id": "710f0332-23d2-4244-a187-03200e04033e",
  "date_created": "2026-03-02T18:02:31.247000Z",
  "date_modified": "2026-03-02T18:02:31.247000Z",
  "file_hash": "915a8c31593ec6e58bed3ede92b53a7eb81fbe84dc184a982b28b73d07775079",
  "private": false,
  "record": {
    "abstract": "We develop generalized bounds for quantum single-parameter estimation\nproblems for which the coupling to the parameter is described by intrinsic\nmulti-system interactions. For a Hamiltonian with $k$-system\nparameter-sensitive terms, the quantum limit scales as $1/N^k$ where $N$ is the\nnumber of systems. These quantum limits remain valid when the Hamiltonian is\naugmented by any parameter independent interaction among the systems and when\nadaptive measurements via parameter-independent coupling to ancillas are\nallowed.",
    "arxiv_id": "quant-ph/0609179",
    "authors": [
      "Sergio Boixo",
      "Steven T. Flammia",
      "Carlton M. Caves",
      "JM Geremia"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.other"
    ],
    "doi": "10.1103/PhysRevLett.98.090401",
    "journal_ref": "Phys. Rev. Lett. 98, 090401 (2007)",
    "title": "Generalized Limits for Single-Parameter Quantum Estimation",
    "url": "https://arxiv.org/abs/quant-ph/0609179"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f76dca64-13cf-4598-86b9-e6e23f17ba7e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}