{
  "annotation_id": "dadf3689-8eba-490a-ae7e-ef65c72f7da1",
  "date_created": "2026-03-02T18:00:53.457000Z",
  "date_modified": "2026-03-02T18:00:53.457000Z",
  "file_hash": "84026f7c889f94b26f03373e24f38eac9dbe8193edc8f33a8206712611dcb647",
  "private": false,
  "record": {
    "abstract": "We have developed a matter wave interferometer based on the diffraction of\natoms from effective absorption gratings of light. In a setup with cold\nrubidium atoms in an atomic fountain the interferometer has been used to carry\nout tests of the equivalence principle on an atomic basis. The gravitational\nacceleration of the two isotopes 85Rb and 87Rb was compared, yielding a\ndifference Dg/g =(1.2 +-1.7)x10^{-7}. We also perform a differential free fall\nmeasurement of atoms in two different hyperfine states, and obtained a result\nof Dg/g =(0.4 +-1.2)x10^{-7}.",
    "arxiv_id": "physics/0411052",
    "authors": [
      "Sebastian Fray",
      "Cristina Alvarez Diez",
      "Theodor W. H\u00e4nsch",
      "Martin Weitz"
    ],
    "categories": [
      "physics.atom-ph",
      "gr-qc",
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.93.240404",
    "journal_ref": "Phys.Rev.Lett. 93 (2004) 240404",
    "title": "Atomic Interferometer with Amplitude Gratings of Light and its   Applications to Atom Based Tests of the Equivalence Principle",
    "url": "https://arxiv.org/abs/physics/0411052"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2e7de27b-354d-4dab-9b2d-fe6fa701bed4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}