{
  "annotation_id": "c966dff1-b387-497e-950b-4c3b29061544",
  "date_created": "2026-03-02T18:02:12.849000Z",
  "date_modified": "2026-03-02T18:02:12.849000Z",
  "file_hash": "8a8f10096c797b0dac9324728a0ec637a9513517d3a5d7dfee8b84c500d2159e",
  "private": false,
  "record": {
    "abstract": "We investigate multipartite entanglement in a non-interacting fermion gas, as\na function of fermion separation, starting from the many particle fermion\ndensity matrix. We prove that all multiparticle entanglement can be built only\nout of two-fermion entanglement. Although from the Pauli exclusion principle we\nwould always expect entanglement to decrease with fermion distance, we\nsurprisingly find the opposite effect for certain fermion configurations. The\nvon Neumann entropy is found to be proportional to the volume for a large\nnumber of particles even when they are arbitrarily close to each other. We will\nillustrate our results using different configurations of two, three, and four\nfermions at zero temperature although all our results can be applied to any\ntemperature and any number of particles.",
    "arxiv_id": "quant-ph/0502122",
    "authors": [
      "C. Lunkes",
      "C. Brukner",
      "V. Vedral"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.95.030503",
    "journal_ref": "Phys. Rev. Lett. 95, 030503 (2005)",
    "title": "Natural multiparticle entanglement in a Fermi gas",
    "url": "https://arxiv.org/abs/quant-ph/0502122"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ac2a7797-8fcf-4091-963b-78442cd8b3ca",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}