{
  "annotation_id": "bef28764-99ee-4bf8-8ffa-2d2dbf96c0f9",
  "date_created": "2026-03-02T18:01:42.642000Z",
  "date_modified": "2026-03-02T18:01:42.642000Z",
  "file_hash": "5b6b737a29f87389ea7a5ccd9bd1cad5c04d20caeee9ab3f11c96d41059f83ae",
  "private": false,
  "record": {
    "abstract": "We describe the operating characteristics of a new type of quantum oscillator\nthat is based on a two-photon stimulated emission process. This two-photon\nlaser consists of spin-polarized and laser-driven $^{39}$K atoms placed in a\nhigh-finesse transverse-mode-degenerate optical resonator, and produces a beam\nwith a power of $\\sim $0.2 $\\mu $W at a wavelength of 770 nm. We observe\ncomplex dynamical instabilities of the state of polarization of the two-photon\nlaser, which are made possible by the atomic Zeeman degeneracy. We conjecture\nthat the laser could emit polarization-entangled twin beams if this degeneracy\nis lifted.",
    "arxiv_id": "quant-ph/0103125",
    "authors": [
      "Olivier Pfister",
      "William J. Brown",
      "Michael D. Stenner",
      "Daniel J. Gauthier"
    ],
    "categories": [
      "quant-ph",
      "nlin.CD"
    ],
    "doi": "10.1103/PhysRevLett.86.4512",
    "journal_ref": "Phys. Rev. Lett. 86, 4512 (2001)",
    "title": "Polarization instabilities in a two-photon laser",
    "url": "https://arxiv.org/abs/quant-ph/0103125"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e5da57e5-4351-49f5-b4b5-289241e313fa",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}