{
  "annotation_id": "2f17c2da-4151-4fc5-9b56-dcaf51f8a1f3",
  "date_created": "2026-03-02T18:00:32.669000Z",
  "date_modified": "2026-03-02T18:00:32.669000Z",
  "file_hash": "d1d0cf60f5e4480f3a24a3a67a7bc8a3f201d49c0c3b08376d7bd334efd81049",
  "private": false,
  "record": {
    "abstract": "To test the cosmic spatial isotropy, we use a rotatable torsion balance\ncarrying a transversely spin-polarized ferrimagnetic Dy_{6}Fe_{23} mass. With a\nrotation period of one hour, the period of anisotropy signal is reduced from\none sidereal day by about 24 times, and hence the 1/f noise is greatly reduced.\nOur present experimental results constrain the cosmic anisotropy Hamiltonian H\n= C_{1} sigma_{1} + C_{2} sigma_{2} + C_{3} sigma_{3} (sigma_{3} is in the axis\nof earth rotation) to (C_{1}^{2} +C_{2}^{2})^{1/2} = (1.8 +- 5.3) X 10^{-21} eV\nand | C_{3} | = (1.2 +- 3.5) X 10^{-19} eV. This improves the previous limits\non (C_{1},C_{2}) by 120 times and C_{3} by a factor of 800.",
    "arxiv_id": "physics/0009012",
    "authors": [
      "Li-Shing Hou",
      "Wei-Tou Ni",
      "Yu-Chu M. Li"
    ],
    "categories": [
      "physics.space-ph"
    ],
    "doi": "10.1103/PhysRevLett.90.201101",
    "journal_ref": "Phys.Rev.Lett.90:201101,2003",
    "title": "Test of Cosmic Spatial Isotropy for Polarized Electrons Using a   Rotatable Torsion Balance",
    "url": "https://arxiv.org/abs/physics/0009012"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d510d802-bf63-4327-89bf-f5112b5e1edb",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}