{
  "annotation_id": "664993c3-8dbe-4f8c-85a1-6f2665cb54b1",
  "date_created": "2026-03-02T18:02:13.809000Z",
  "date_modified": "2026-03-02T18:02:13.809000Z",
  "file_hash": "51e6050a00d64b79e151164653b668aa99ab5e639e34e9ee3d77ec078f774305",
  "private": false,
  "record": {
    "abstract": "We consider the ground state of simple quantum systems coupled to an\nenvironment. In general the system is entangled with its environment. As a\nconsequence, even at zero temperature, the energy of the system is not sharp: a\nprojective measurement can find the system in an excited state. We show that\nenergy fluctuation measurements at zero temperature provide entanglement\ninformation. For two-state systems which exhibit a persistent current in the\nground state, energy fluctuations and persistent current fluctuations are\nclosely related. The harmonic oscillator serves to illustrate energy\nfluctuations in a system with an infinite number of states. In addition to the\nenergy distribution we discuss the energy-energy time-correlation function in\nthe zero-temperature limit.",
    "arxiv_id": "quant-ph/0501018",
    "authors": [
      "M. Buttiker",
      "A. N. Jordan"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.mes-hall"
    ],
    "doi": "10.1016/j.physe.2005.05.024",
    "journal_ref": "Physica E 29, 272 (2005)",
    "title": "Ground State Entanglement Energetics",
    "url": "https://arxiv.org/abs/quant-ph/0501018"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8a4d9b4d-06d4-456c-91ed-647096396ca2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}