{
  "annotation_id": "095cf72f-7367-44f7-9f36-d1834f30faf5",
  "date_created": "2026-03-02T18:02:24.248000Z",
  "date_modified": "2026-03-02T18:02:24.248000Z",
  "file_hash": "6d59a7f589b77821f57f5cd7c6418344477da32426c93264e6b69e1b63f21398",
  "private": false,
  "record": {
    "abstract": "We calculate the fidelity of transmission of a single qubit between distant\nsites on semi-infinite and finite chains of spins coupled via the magnetic\ndipole interaction. We show that such systems often perform better than their\nHeisenberg nearest-neighbour coupled counterparts, and that fidelities closely\napproaching unity can be attained between the ends of finite chains without any\nspecial engineering of the system, although state transfer becomes slow in long\nchains. We discuss possible optimization methods, and find that, for any\nlength, the best compromise between the quality and the speed of the\ncommunication is obtained in a nearly uniform chain of 4 spins.",
    "arxiv_id": "quant-ph/0603148",
    "authors": [
      "M. Avellino",
      "A. J. Fisher",
      "S. Bose"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.74.012321",
    "journal_ref": "PHYSICAL REVIEW A 74, 012321 (2006)",
    "title": "Quantum Communication in Spin Systems With Long-Range Interactions",
    "url": "https://arxiv.org/abs/quant-ph/0603148"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e52b0e5c-d9dd-4d2d-934e-2ff8c2d9f4f8",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}