{
  "annotation_id": "a2b3a706-e34d-4887-af97-baa28822f9da",
  "date_created": "2026-03-02T18:02:06.402000Z",
  "date_modified": "2026-03-02T18:02:06.402000Z",
  "file_hash": "2de6afe2ef5bc4b9268d7f41d1402eeffbe7252bef7e0c1cbc5b7344cc66cb39",
  "private": false,
  "record": {
    "abstract": "We consider the task of estimating the randomly fluctuating phase of a\ncontinuous-wave beam of light. Using the theory of quantum parameter\nestimation, we show that this can be done more accurately when feedback is used\n(adaptive phase estimation) than by any scheme not involving feedback\n(non-adaptive phase estimation) in which the beam is measured as it arrives at\nthe detector. Such schemes not involving feedback include all those based on\nheterodyne detection or instantaneous canonical phase measurements. We also\ndemonstrate that the superior accuracy adaptive phase estimation is present in\na regime conducive to observing it experimentally.",
    "arxiv_id": "quant-ph/0405066",
    "authors": [
      "D. T. Pope",
      "H. M. Wiseman",
      "N. K. Langford"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.70.043812",
    "title": "Adaptive phase estimation is more accurate than non-adaptive phase   estimation for continuous beams of light",
    "url": "https://arxiv.org/abs/quant-ph/0405066"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0ee2cdaa-a6be-4f33-8f0e-1e534f10cd10",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}