{
  "annotation_id": "426603b1-d06a-4ff8-b9fd-ffc7a9a84c54",
  "date_created": "2026-03-02T18:02:37.949000Z",
  "date_modified": "2026-03-02T18:02:37.949000Z",
  "file_hash": "6805e137519a75218a97a60977747237b43393a889d24868a49db2b22a238e90",
  "private": false,
  "record": {
    "abstract": "We study the phase sensitivity of SU(2) and SU(1,1) interferometers fed by\ntwo-mode field states which are intelligent states for Hermitian generators of\nthe SU(2) and SU(1,1) groups, respectively. Intelligent states minimize\nuncertainty relations and this makes possible an essential reduction of the\nquantum noise in interferometers. Exact closed expressions for the minimum\ndetectable phase shift are obtained in terms of the Jacobi polynomials. These\nexpressions are compared with results for some conventional input states, and\nsome known results for the squeezed input states are reviewed. It is shown that\nthe phase sensitivity for an interferometer that employs squeezing-producing\nactive devices (such as four-wave mixers) should be analyzed in two regimes:\n(i) fixed input state and variable interferometer, and (ii) fixed\ninterferometer and variable input state. The behavior of the phase sensitivity\nis essentially different in these two regimes. The use of the SU(2) intelligent\nstates allows us to achieve a phase sensitivity of order $1/\\bar{N}$ (where\n$\\bar{N}$ is the total number of photons passing through the phase shifters of\nthe interferometer) without adding four-wave mixers. This avoids the duality in\nthe behavior of the phase sensitivity that occurs for the squeezed input. On\nthe other hand, the SU(1,1) intelligent states have the property of achieving\nthe phase sensitivity of order $1/\\bar{N}$ in both regimes.",
    "arxiv_id": "quant-ph/9608021",
    "authors": [
      "C. Brif",
      "A. Mann"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.54.4505",
    "journal_ref": "Phys.Rev. A54 (1996) 4505",
    "title": "Nonclassical interferometry with intelligent light",
    "url": "https://arxiv.org/abs/quant-ph/9608021"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f4d6104f-a57a-461c-9010-6ccf24e75785",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}