{
  "annotation_id": "f7be138c-8c14-409b-954c-d968924c1231",
  "date_created": "2026-03-02T18:00:56.883000Z",
  "date_modified": "2026-03-02T18:00:56.883000Z",
  "file_hash": "5d0beaafd1ebddbd5b95d47659f6097ed3ce0649df7b9e2ca5e4fa9b7b7b11db",
  "private": false,
  "record": {
    "abstract": "We investigate the physics of an optically-driven micromotor of biological\norigin. A single, live red blood cell, when placed in an optical trap folds\ninto a rod-like shape. If the trapping laser beam is circularly polarized, the\nfolded RBC rotates. A model based on the concept of buckling instabilities\ncaptures the folding phenomenon; the rotation of the cell is simply understood\nusing the Poincar\\`e sphere. Our model predicts that (i) at a critical\nintensity of the trapping beam the RBC shape undergoes large fluctuations and\n(ii) the torque is proportional to the intensity of the laser beam. These\npredictions have been tested experimentally. We suggest a possible mechanism\nfor emergence of birefringent properties in the RBC in the folded state.",
    "arxiv_id": "physics/0501099",
    "authors": [
      "A. Ghosh",
      "Supurna Sinha",
      "J. A. Dharmadhikari",
      "S. Roy",
      "A. K. Dharmadhikari",
      "J. Samuel",
      "S. Sharma",
      "D. Mathur"
    ],
    "categories": [
      "physics.bio-ph",
      "cond-mat.soft",
      "physics.optics"
    ],
    "doi": "10.1088/1478-3975/3/1/007",
    "journal_ref": "Phys. Biol. 3 (2006) 67-73",
    "title": "Euler buckling in red blood cells: An optically driven biological   micromotor",
    "url": "https://arxiv.org/abs/physics/0501099"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d384355f-1d98-429a-aaa6-702ca3d983b9",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}