{
  "annotation_id": "192603d9-7c7f-401e-ba7b-d5e8cb8038de",
  "date_created": "2026-03-02T18:01:49.065000Z",
  "date_modified": "2026-03-02T18:01:49.065000Z",
  "file_hash": "f6bd0c562bd9e488a049c51b35698da02d6e797d253ec004accdf8608fee87e3",
  "private": false,
  "record": {
    "abstract": "Entanglement is an useful resource because some global operations cannot be\nlocally implemented using classical communication. We prove a number of results\nabout what is and is not locally possible. We focus on orthogonal states, which\ncan always be globally distinguished. We establish the necessary and sufficient\nconditions for a general set of 2x2 quantum states to be locally\ndistinguishable, and for a general set of 2xn quantum states to be\ndistinguished given an initial measurement of the qubit. These results reveal a\nfundamental asymmetry to nonlocality, which is the origin of ``nonlocality\nwithout entanglement\u0027\u0027, and we present a very simple proof of this phenomenon.",
    "arxiv_id": "quant-ph/0202034",
    "authors": [
      "Jonathan Walgate",
      "Lucien Hardy"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.89.147901",
    "title": "Nonlocality, Asymmetry, and Distinguishing Bipartite States",
    "url": "https://arxiv.org/abs/quant-ph/0202034"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e0b53ecd-d3e1-4b68-b273-43e0355da3d7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}