{
  "annotation_id": "e8409024-419e-40a4-90c4-510a2369c97b",
  "date_created": "2026-03-02T18:01:49.147000Z",
  "date_modified": "2026-03-02T18:01:49.147000Z",
  "file_hash": "6ec7fbecfe5dad94a17fb1446f663e0595785b1f056e05c7e478aa9596a68d60",
  "private": false,
  "record": {
    "abstract": "It is showed on the basis of the multiple-quantum operator algebra space\nformalism that ultra-broadband heteronuclear Hartmann-Hahn polarization\ntransfer could be achieved by the amplitude- and frequency-modulation\nquasi-adiabatic excitation (90 degree) pulses, while it is usually difficult\nfor the adiabatic inversion pulses to achieve effectively broadband\nHartmann-Hahn transfer in a heteronuclear coupled two-spin system. The\nadiabatic and quasi-adiabatic pulses have an important property that within\ntheir activation bandwidth flip angle of the pulses is independent of the pulse\nduration and the bandwidth increases as the pulse duration. This property is\nimportanr for construction of the heteronuclear Hartmann-Hahn transfer\nsequences with the quasi-adiabatic 90 degree pulses. Theoretic analysis and\nnumerical simulation show that the heteronuclear Hartmann-Hahn transfer is\nperformed in the even-order multiple- quantum operator algebra subspace of the\ntwo-spin system. The multiple-quantum operator algebra space formalism may give\na powerful guide to the construction of ultra- broadband heteronuclear\nHartmann-Hahn transfer sequences with the quasi-adiabatic 90 degree pulses.",
    "arxiv_id": "quant-ph/0203079",
    "authors": [
      "Xijia Miao"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Ultra-broadband Heteronuclear Hartmann-Hahn polarization transfer",
    "url": "https://arxiv.org/abs/quant-ph/0203079"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1a28832e-06e3-43f5-a5d6-4218ecffe394",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}