{
  "annotation_id": "04ca715e-0704-4fc7-8472-dbce51c932cc",
  "date_created": "2026-03-02T18:01:25.147000Z",
  "date_modified": "2026-03-02T18:01:25.147000Z",
  "file_hash": "c58825b9bc4708067483805fc3761d9d6945ac4da733ce0ca78e910394d65f6f",
  "private": false,
  "record": {
    "abstract": "A new variational principle for optimizing thermal density matrices is\nintroduced. As a first application, the variational many body density matrix is\nwritten as a determinant of one body density matrices, which are approximated\nby Gaussians with the mean, width and amplitude as variational parameters. The\nmethod is illustrated for the particle in an external field problem, the\nhydrogen molecule and dense hydrogen where the molecular, the dissociated and\nthe plasma regime are described. Structural and thermodynamic properties\n(energy, equation of state and shock Hugoniot) are presented.",
    "arxiv_id": "physics/9910009",
    "authors": [
      "Burkhard Militzer",
      "E. L. Pollock"
    ],
    "categories": [
      "physics.plasm-ph",
      "physics.comp-ph"
    ],
    "doi": "10.1103/PhysRevE.61.3470",
    "title": "Variational Density Matrix Method for Warm Condensed Matter and   Application to Dense Hydrogen",
    "url": "https://arxiv.org/abs/physics/9910009"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2081586b-7fa1-4aaf-983f-9c5e9b8e48dc",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}