{
  "annotation_id": "85182629-91e4-4e5f-8df1-b0b1341dc935",
  "date_created": "2026-03-02T18:02:12.578000Z",
  "date_modified": "2026-03-02T18:02:12.578000Z",
  "file_hash": "0c1a3b28f68bc77e518824062d7ef51432df849c3f5c8f9092bc4ff3a532d8a9",
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  "record": {
    "abstract": "We discuss a novel form of the variational approach in Quantum Field Theory\nin which the trial quantum configuration is represented directly in terms of\nrelevant expectation values rather than, e.g., increasingly complicated\nstructure from Fock space. The quantum algebra imposes constraints on such\nexpectation values so that the variational problem is formulated here as an\noptimization under constraints. As an example of application of such approach\nwe consider the study of ground state and critical properties in a variant of\nnonlinear sigma model.",
    "arxiv_id": "quant-ph/0410197",
    "authors": [
      "Yuriy Mishchenko",
      "Chueng-Ryong Ji"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1142/S0217751X05026819",
    "journal_ref": "Int.J.Mod.Phys. A20 (2005) 3488-3494",
    "title": "A novel variational approach for Quantum Field Theory: example of study   of the ground state and phase transition in Nonlinear Sigma Model",
    "url": "https://arxiv.org/abs/quant-ph/0410197"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "45c69d10-717f-483b-b5ba-1bc72abf799e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}