{
  "annotation_id": "a71ff4a8-af4a-4131-878c-32fee760cc72",
  "date_created": "2026-03-02T18:02:24.007000Z",
  "date_modified": "2026-03-02T18:02:24.007000Z",
  "file_hash": "33e5cf7af42a73f5db59c9959a9cf5520a1aab7265dca2f00243bc271e05e71e",
  "private": false,
  "record": {
    "abstract": "We consider the problem of evaluating the entanglement of non-Gaussian mixed\nstates generated by photon subtraction from entangled squeezed states. The\nentanglement measures we use are the negativity and the logarithmic negativity.\nThese measures possess the unusual property of being computable with linear\nalgebra packages even for high-dimensional quantum systems. We numerically\nevaluate these measures for the non-Gaussian mixed states which are generated\nby photon subtraction with on/off photon detectors. The results are compared\nwith the behavior of certain operational measures, namely the teleportation\nfidelity and the mutual information in the dense coding scheme. It is found\nthat all of these results are mutually consistent, in the sense that whenever\nthe enhancement is seen in terms of the operational measures, the negativity\nand the logarithmic negativity are also enhanced.",
    "arxiv_id": "quant-ph/0512069",
    "authors": [
      "Akira Kitagawa",
      "Masahiro Takeoka",
      "Masahide Sasaki",
      "Anthony Chefles"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.73.042310",
    "journal_ref": "Phys. Rev. A 73, 042310 (2006)",
    "title": "Entanglement evaluation of non-Gaussian states generated by photon   subtraction from squeezed states",
    "url": "https://arxiv.org/abs/quant-ph/0512069"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "7bbb8d76-8fc1-4bea-9d80-b00f7c83c9c6",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}