{
  "annotation_id": "b4c8e8c5-0c4f-4d71-a865-4a13a83632ab",
  "date_created": "2026-03-02T18:01:38.859000Z",
  "date_modified": "2026-03-02T18:01:38.859000Z",
  "file_hash": "3e2e15548c9441f93d4a5f1b69ecb0353783ba0e97815592b21e7c8ee78ca399",
  "private": false,
  "record": {
    "abstract": "Nonclassical correlations between the quadrature-phase amplitudes of two\nspatially separated optical beams are exploited to realize a two-channel\nquantum communication experiment with a high degree of immunity to\ninterception. For this scheme, either channel alone can have an arbitrarily\nsmall signal-to-noise ratio (SNR) for transmission of a coherent ``message\u0027\u0027.\nHowever, when the transmitted beams are combined properly upon authorized\ndetection, the encoded message can in principle be recovered with the original\nSNR of the source. An experimental demonstration has achieved a 3.2 dB\nimprovement in SNR over that possible with correlated classical sources.\nExtensions of the protocol to improve its security against eavesdropping are\ndiscussed.",
    "arxiv_id": "quant-ph/0003094",
    "authors": [
      "S. F. Pereira",
      "Z. Y. Ou",
      "H. J. Kimble"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.62.042311",
    "title": "Quantum Communication with Correlated Nonclassical States",
    "url": "https://arxiv.org/abs/quant-ph/0003094"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1b5e501a-7c43-475b-966c-bf73d3b537ef",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}