{
  "annotation_id": "15d48e60-2bb9-4884-805e-4dbe693b2bb0",
  "date_created": "2026-03-02T18:00:42.740000Z",
  "date_modified": "2026-03-02T18:00:42.740000Z",
  "file_hash": "194923d4244cc15a8352603e493091d96428cb5468ac926b8c55315db3f05942",
  "private": false,
  "record": {
    "abstract": "We observe the formation of an intense optical wavepacket fully localized in\nall dimensions, i.e. both longitudinally (in time) and in the transverse plane,\nwith an extension of a few tens of fsec and microns, respectively. Our\nmeasurements show that the self-trapped wave is a X-shaped light bullet\nspontaneously generated from a standard laser wavepacket via the nonlinear\nmaterial response (i.e., second-harmonic generation), which extend the soliton\nconcept to a new realm, where the main hump coexists with conical tails which\nreflect the symmetry of linear dispersion relationship.",
    "arxiv_id": "physics/0303083",
    "authors": [
      "P. Di Trapani",
      "G. Valiulis",
      "A. Piskarskas",
      "O. Jedrkiewicz",
      "J. Trull",
      "C. Conti",
      "S. Trillo"
    ],
    "categories": [
      "physics.optics"
    ],
    "doi": "10.1103/PhysRevLett.91.093904",
    "title": "Spontaneously generated X-shaped light bullets",
    "url": "https://arxiv.org/abs/physics/0303083"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a423dcad-8090-4fdc-99b6-794728f19c14",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}