{
  "annotation_id": "f4f95caf-47aa-4396-83a6-ffc60c37653c",
  "date_created": "2026-03-02T18:01:45.960000Z",
  "date_modified": "2026-03-02T18:01:45.960000Z",
  "file_hash": "a080719fb2d43f805b1221f5b27485ccd8bcf83d53a71e98cbe79303c891c365",
  "private": false,
  "record": {
    "abstract": "The influence of losses in the transmission of continuous-variable entangled\nlight through linear devices such as optical fibers is studied, with special\nemphasis on Gaussian states. Upper bounds on entanglement and the distance to\nthe set of separable Gaussian states are calculated. Compared with the distance\nmeasure, the bounds can substantially overestimate the entanglement and thus do\nnot show the drastic decrease of entanglement with increasing mean photon\nnumber, as does the distance measure. In particular, it shows that losses give\nrise to entanglement saturation, which principally limits the amount of\ninformation that can be transferred quantum mechanically in continuous-variable\nteleportation. Even for an initially infinitely squeezed two-mode squeezed\nvacuum, high-fidelity teleportation is only possible over distances that are\nmuch smaller than the absorption lengths.",
    "arxiv_id": "quant-ph/0105111",
    "authors": [
      "Dirk-Gunnar Welsch",
      "Stefan Scheel",
      "Aleksej V. Chizhov"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Entanglement degradation in continuous-variable quantum teleportation",
    "url": "https://arxiv.org/abs/quant-ph/0105111"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "aca37f67-33ec-4e85-b3a6-f5de21620004",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}