{
  "annotation_id": "b5989697-57e8-40c1-9716-cf38174cdc85",
  "date_created": "2026-03-02T18:02:51.354000Z",
  "date_modified": "2026-03-02T18:02:51.354000Z",
  "file_hash": "e6ec7792efd9efdcdd8f88112bb8645dc77fed8cfb34c927212e659a2c7986a6",
  "private": false,
  "record": {
    "abstract": "The spectrum of finite-difference two-magnon operator is investigated for\nquantum S=1/2 chain with variable range exchange of the form $h(j-k)\\propto\n\\sinh^{-2}a(j-k)$. It is found that usual bound state appears for some values\nof the total pseudomomentum of two magnons as for the Heisenberg chain with\nnearest-neighbor spin interaction. Besides this state, a new type of bound\nstate with oscillating wave function appears at larger values of the total\npseudomomentum.",
    "arxiv_id": "solv-int/9612008",
    "authors": [
      "J. Dittrich",
      "V. I. Inozemtsev"
    ],
    "categories": [
      "solv-int",
      "cond-mat.stat-mech",
      "nlin.SI"
    ],
    "doi": "10.1142/S0217984997000554",
    "title": "On the two-magnon bound states for the quantum Heisenberg chain with   variable range exchange",
    "url": "https://arxiv.org/abs/solv-int/9612008"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "76fa64a6-6a42-4141-a02c-240a31fc6d75",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}