{
  "annotation_id": "aae07d7d-fb0d-42f8-83f8-4f7cee470b49",
  "date_created": "2026-03-02T18:00:35.517000Z",
  "date_modified": "2026-03-02T18:00:35.517000Z",
  "file_hash": "e2400e8118810493e859c4c4cc8089babb5f2c0cf6ea8a72ff874910d5fc182f",
  "private": false,
  "record": {
    "abstract": "Presented is an overview of electromagnetic versions of the so-called X-type\nwaves intensively studied since their invention in early 1990.-ies in\nultrasonics. These waves may be extremely localized both laterally and\nlongitudinally and - what has been considered as most startling - propagate\nsuperluminally without apparent spread. Spotlighted are the issues of the\nrelativistic causality, variety of mathematical description and possibilities\nof practical applications of the waves.",
    "arxiv_id": "physics/0103054",
    "authors": [
      "Peeter Saari"
    ],
    "categories": [
      "physics.optics",
      "physics.gen-ph"
    ],
    "journal_ref": "Printed in: Time\u0027s Arrows, Quantum Measurement and Superluminal\n  Behavior, Scientific Monographs: Physics Sciences Series, Italian CNR Publ.\n  Rome, 2001, pp. 37-48.",
    "title": "Superluminal Localized Waves of Electromagnetic Field in Vacuo",
    "url": "https://arxiv.org/abs/physics/0103054"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1ca2a08a-718c-4179-ab73-fe13ac396059",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}