{
  "annotation_id": "145a274d-b3a5-4085-ab52-0af71c03a1bd",
  "date_created": "2026-03-02T18:02:13.220000Z",
  "date_modified": "2026-03-02T18:02:13.220000Z",
  "file_hash": "f2388e90cc403952a15af2cda918821e01dfc4005c76cfeb47f430b1a3348e39",
  "private": false,
  "record": {
    "abstract": "We study quantum key distribution with standard weak coherent states and\nshow, rather counter-intuitively, that the detection events originated from\nvacua can contribute to secure key generation rate, over and above the best\nprior art result. Our proof is based on a communication complexity/quantum\nmemory argument.",
    "arxiv_id": "quant-ph/0503004",
    "authors": [
      "Hoi-Kwong Lo"
    ],
    "categories": [
      "quant-ph"
    ],
    "journal_ref": "Quantum Information and Computation Vol 5, No. 4\u00265 (2005) 413-418.",
    "title": "Getting Something Out of Nothing",
    "url": "https://arxiv.org/abs/quant-ph/0503004"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ab4f1c2b-6eb4-4aad-80d9-ab15f1471e28",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}