{
  "annotation_id": "4279ae09-6926-47fc-a96e-f71793e268d6",
  "date_created": "2026-03-02T18:01:38.735000Z",
  "date_modified": "2026-03-02T18:01:38.735000Z",
  "file_hash": "b04ebdcc0b98c65dcefaedf3435b807ab7cf5ffaed14a71e2b1ef422b7164788",
  "private": false,
  "record": {
    "abstract": "A nondegenerate four-level N-type scheme was experimentally implemented to\nobserve electromagnetically induced transparency (EIT) at the $^{87}$Rb D$_{2}$\nline. Radiations of two independent external-cavity semiconductor lasers were\nused in the experiment, the current of one of them being modulated at a\nfrequency equal to the hyperfine-splitting frequency of the excited 5P$_{3/2}$\nlevel. In this case, apart from the main EIT dip corresponding to the\ntwo-photon Raman resonance in a three-level $\\Lambda$-scheme, additional dips\ndetuned from the main dip by a frequency equal to the frequency of the HF\ngenerator were observed in the absorption spectrum. These dips were due to an\nincrease in the medium transparency at frequencies corresponding to the\nthree-photon Raman resonances in four-level N-type schemes. The resonance\nshapes are analyzed as functions of generator frequency and magnetic field.",
    "arxiv_id": "quant-ph/0006007",
    "authors": [
      "V. M. Entin",
      "I. I. Ryabtsev",
      "A. E. BoguslavskiI",
      "I. M. Beterov"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1134/1.568308",
    "journal_ref": "JETP Letters, Vol. 71, No. 5, 2000, pp. 175-177",
    "title": "Experimental implementation of a four-level N-type scheme for the   observation of Electromagnetically Induced Transparency",
    "url": "https://arxiv.org/abs/quant-ph/0006007"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b8c48cbd-832e-48aa-9a9e-8f008604c8e9",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}