{
  "annotation_id": "1fc9672f-f3b6-4928-85ab-55824a8a07ee",
  "date_created": "2026-03-02T18:00:28.969000Z",
  "date_modified": "2026-03-02T18:00:28.969000Z",
  "file_hash": "c61f9054897b0ecd6b2385a0003653a93213f8d464619b71fcf65759d03e3345",
  "private": false,
  "record": {
    "abstract": "We show that a bounded source cannot produce a unipolar electromagnetic\npulse. As a consequence, there are no three-dimensional electromagnetic\nsolitons in vacuum.",
    "arxiv_id": "physics/0003064",
    "authors": [
      "Kwang-Je Kim",
      "Kirk T. McDonald",
      "Gennady V. Stupakov",
      "Max S. Zolotorev"
    ],
    "categories": [
      "physics.class-ph"
    ],
    "title": "A bounded source cannot emit a unipolar electromagnetic wave",
    "url": "https://arxiv.org/abs/physics/0003064"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "7324357f-f716-465d-a7e2-a67262d8b0eb",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}