{
  "annotation_id": "40a782fb-f3fb-479a-9b1a-52c7f6732f02",
  "date_created": "2026-03-02T18:02:41.165000Z",
  "date_modified": "2026-03-02T18:02:41.165000Z",
  "file_hash": "c09be3eacfa5462f681a5be7abbb1d084c2fa1246931d55be447fc39f957ae1d",
  "private": false,
  "record": {
    "abstract": "We describe a non-Abelian Berry phase in polarisation optics, suggested by an\nanalogy due to Nityananda between boosts in special relativity and the effect\nof elliptic dichroism on polarised light. The analogy permits a simple optical\nrealization of the non-Abelian gauge field describing Thomas rotation. We also\nshow how Thomas rotation can be understood geometrically on the Poincar\\\u0027{e}\nsphere in terms of the Pancharatnam phase.",
    "arxiv_id": "quant-ph/9705023",
    "authors": [
      "Joseph Samuel",
      "Supurna Sinha"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Thomas Rotation and Polarised Light: A non-Abelian Geometric Phase in   Optics",
    "url": "https://arxiv.org/abs/quant-ph/9705023"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "cb97540d-8751-4704-b60c-15f705d9ea80",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}