{
  "annotation_id": "c5c29b52-2165-419e-8fa7-7d2d940b113c",
  "date_created": "2026-03-02T18:02:27.225000Z",
  "date_modified": "2026-03-02T18:02:27.225000Z",
  "file_hash": "c14806b72c267160cc664f43c8a60c9d8a523a249a3eb51aa6e74a2d0265c21d",
  "private": false,
  "record": {
    "abstract": "Using a density matrix approach, we study the simplest systems that display\nboth gain and feedback: clusters of 2 to 5 atoms, one of which is pumped. The\nother atoms supply feedback through multiple scattering of light. We show that,\nif the atoms are in each other\u0027s near-field, the system exhibits large gain\nnarrowing and spectral mode redistribution. The observed phenomena are more\npronounced if the feedback is enhanced. Our system is to our knowledge the\nsimplest exactly solvable microscopic system which shows the approach to laser\noscillation.",
    "arxiv_id": "quant-ph/0604040",
    "authors": [
      "Tom Savels",
      "Allard P. Mosk",
      "Ad Lagendijk"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.98.103601",
    "journal_ref": "Phys. Rev. Lett. 98, 103601 (2007)",
    "title": "Gain narrowing in few-atom systems",
    "url": "https://arxiv.org/abs/quant-ph/0604040"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ac404075-6619-412e-a0e0-ec08c6a4d22e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}