{
  "annotation_id": "4e93f4d2-8221-4aab-bc3f-ef185e28279f",
  "date_created": "2026-03-02T18:01:21.754000Z",
  "date_modified": "2026-03-02T18:01:21.754000Z",
  "file_hash": "7f706d0d5c4373f0e1c787e33d20fee880730730d8cbb7c3d0faddf067c78fc3",
  "private": false,
  "record": {
    "abstract": "It recently has been demonstrated that signals conveyed by evanescent modes\ncan travel faster than light. In this report some special features of signals\nare introduced and investigated, for instance the fundamental property that\nsignals are frequency band limited.\n  Evanescent modes are characterized by extraordinary properties: Their energy\nis {\\it negative}, they are not directly measurable, and the evanescent region\nis not causal since the modes traverse this region instantaneously. The study\ndemonstrates the necessity of quantum mechanical principles in order to\ninterprete the superluminal signal velocity of classical evanescent modes.",
    "arxiv_id": "physics/9812053",
    "authors": [
      "Guenter Nimtz"
    ],
    "categories": [
      "physics.class-ph"
    ],
    "doi": "10.1002/(SICI)1521-3889(199812)7:7/8\u003c618::AID-ANDP618\u003e3.0.CO;2-P",
    "journal_ref": "Ann. Phys. (Leipzig) 7 (1998) 618",
    "title": "Superluminal Signal Velocity",
    "url": "https://arxiv.org/abs/physics/9812053"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "81eb0060-4a82-4061-b18f-7b8c1a93b993",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}