{
  "annotation_id": "5e60a2eb-074b-4efe-8a88-d11e3d88d321",
  "date_created": "2026-03-02T18:01:58.981000Z",
  "date_modified": "2026-03-02T18:01:58.981000Z",
  "file_hash": "ab5df353f20104051bdc256b7bd21b4418280ec299d67f4a0727eb2deba68424",
  "private": false,
  "record": {
    "abstract": "Having the quantum correlations in a general bipartite state in mind, the\ninformation accessible by simultaneous measurement on both subsystems is shown\nnever to exceed the information accessible by measurement on one subsystem,\nwhich, in turn is proved not to exceed the von Neumann mutual information. A\nparticular pair of (opposite- subsystem) observables are shown to be\nresponsible both for the amount of quasi-classical correlations and for that of\nthe purely quantum entanglement in the pure-state case: the former via\nsimultaneous subsystem measurements, and the latter through the entropy of\ncoherence or of incompatibility, which is defined for the general case. The\nobservables at issue are so-called twin observables. A general definition of\nthe latter is given in terms of their detailed properties.",
    "arxiv_id": "quant-ph/0305187",
    "authors": [
      "F. Herbut"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.66.052321",
    "journal_ref": "Phys. Rev. A 66 (2002) 052321-1-6",
    "title": "Chains of Quasi-Classical Informations for Bipartite Correlations and   the Role of Twin Observables",
    "url": "https://arxiv.org/abs/quant-ph/0305187"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "887b9a32-fe04-4b3a-b061-2beaba4ee675",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}