{
  "annotation_id": "878bea4b-1394-457c-9990-f807a2b79b0f",
  "date_created": "2026-03-02T18:02:27.557000Z",
  "date_modified": "2026-03-02T18:02:27.557000Z",
  "file_hash": "2c0c5a205c134c685a265fcd47f5f6b2ac7e43e217763c19f36dd632edc7525e",
  "private": false,
  "record": {
    "abstract": "We show that when a suitable entanglement generating unitary operator\ndepending on a parameter is applied on N qubits in parallel, and an appropriate\nobservable is measured, a precision of order 2 raised to the power (-N) in\nestimating the parameter may be achieved. This exponentially improves the\nprecision achievable in classical and in quantum non-entangling parallel\nstrategies. We propose a quantum-optics model of laser light interacting with\nan N-qubit system, say a polyatomic molecule, via a generalized Jaynes-Cummings\ninteraction which, in principle, could achieve the exponentially enhanced\nprecision.",
    "arxiv_id": "quant-ph/0607152",
    "authors": [
      "S. M. Roy",
      "Samuel L. Braunstein"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.100.220501",
    "title": "Exponentially Enhanced Quantum Metrology",
    "url": "https://arxiv.org/abs/quant-ph/0607152"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "724ff1f0-3802-48a9-a8e6-66ae239dfc89",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}