{
  "annotation_id": "dd990902-3d62-4a4e-b975-141240758fe4",
  "date_created": "2026-03-02T18:00:56.867000Z",
  "date_modified": "2026-03-02T18:00:56.867000Z",
  "file_hash": "3ab95d5ab2ea1d3f9bde25888f0a4975938e5c9ed570d7c25ab307f05c1e5c3b",
  "private": false,
  "record": {
    "abstract": "We measured the overall motion of Brownian particles suspended in water by a\nself-mixing thin-slice solid-state laser with extreme optical sensitivity. From\nthe demodulated signal of laser intensity fluctuations through self-mixing\nmodulations by the interference between the lasing field and Doppler-shifted\nscattered fields from Brownian particles, it was found that the changes over\ntime in random walks of small particles suspended in water result in different\noverall dynamics when the field of vision for particles seen by the laser beam\n(scale of the observation) is changed. At a small focal volume of the laser\nbeam, in which the relevant diffusion broadening is observed, the overall\nmotion which can be represented by the motion of a \u0027\u0027virtual\u0027\u0027 single particle\nwhose velocity obeys a double-peaked non-Gaussian distribution function. The\nfast motion of a virtual particle, featuring fractional Brownian motion, which\nleads to a pure random walk with increasing the observation time, has been\ncharacterized in terms of mean-square displacements of a virtual particle.",
    "arxiv_id": "physics/0505156",
    "authors": [
      "Kenju Otsuka",
      "Koji Kamikariya",
      "Takayuki Ohtomo",
      "Seiichi Sudo",
      "Hironori Makino"
    ],
    "categories": [
      "physics.optics"
    ],
    "title": "Brownian Motion Captured with a Self-Mixing Laser",
    "url": "https://arxiv.org/abs/physics/0505156"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b48adf46-c9bb-43cb-bc83-72b549ff823a",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}