{
  "annotation_id": "7762f26b-3b2e-49b7-a09e-b2abadae93a2",
  "date_created": "2026-03-02T18:02:06.586000Z",
  "date_modified": "2026-03-02T18:02:06.586000Z",
  "file_hash": "abc1adf18be9f12c09686e677f376c6052a92381e1dcca9d28852ed4e5ed6f9c",
  "private": false,
  "record": {
    "abstract": "We discuss a general parametrization for vertices of quantum graphs and show,\nin particular, how the $\\delta\u0027_s$ and $\\delta\u0027$ coupling at an $n$ edge vertex\ncan be approximated by means of $n+1$ couplings of the $\\delta$ type provided\nthe latter are properly scaled.",
    "arxiv_id": "quant-ph/0404136",
    "authors": [
      "Taksu Cheon",
      "Pavel Exner"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.mes-hall",
      "math-ph",
      "math.MP"
    ],
    "doi": "10.1088/0305-4470/37/29/L01",
    "journal_ref": "Journal of Physics A37 (2004) L329-L335.",
    "title": "An approximation to $\\delta\u0027$ couplings on graphs",
    "url": "https://arxiv.org/abs/quant-ph/0404136"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b405cea4-20aa-4b07-a35a-299b2c58d50c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}