{
  "annotation_id": "b1ec0c97-178f-4d2f-ae49-4ea40b1910fe",
  "date_created": "2026-03-02T18:00:39.550000Z",
  "date_modified": "2026-03-02T18:00:39.550000Z",
  "file_hash": "2e4408498108553afa654556e28517870f8fe1260384c6234279b02a7b6230d0",
  "private": false,
  "record": {
    "abstract": "We investigate high-harmonic generation in closed systems, using the\ntwo-level atom as a simplified model. By means of a windowed Fourier transform\nof the time-dependent dipole acceleration, we extract the main contributions to\nthis process within a cycle of the driving field. We show that the patterns\nobtained can be understood by establishing a parallel between the two-level\natom and the three-step model. In both models, high-harmonic generation is a\nconsequence of a three-step process, which involves either the continuum and\nthe ground state, or the adiabatic states of the two-level Hamiltonian. The\nknowledge of this physical mechanism allows us to manipulate the adiabatic\nstates, and consequently the harmonic spectra, by means of a bichromatic\ndriving field. Furthermore, using scaling laws, we establish sharp criteria for\nthe invariance of the physical quantities involved. Consequently, our results\ncan be extended to a broader parameter range, as for instance those\ncharacteristic of solid-state systems in strong fields.",
    "arxiv_id": "physics/0112076",
    "authors": [
      "C. Figueira de Morisson Faria",
      "I Rotter"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "title": "High-harmonic generation and periodic level crossings: time profile and   control",
    "url": "https://arxiv.org/abs/physics/0112076"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9271c09e-bf09-49b0-97a4-eb77d2dc43ad",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}