{
  "model": "Heisenberg",
  "lattice": "square",
  "n_sites": 50,
  "boundary": "P",
  "params": {},
  "instance_id": "Heisenberg/square_50_P",
  "rows": [
    {
      "energy": -135.020407726,
      "sigma": 4e-10,
      "energy_variance": null,
      "dof": 50,
      "einf": 0,
      "v_score": null,
      "method": "Exact Diagonalization",
      "bound_type": "exact",
      "bound_type_reason": "exact diagonalization|ex",
      "reference": "[paper](https://journals.aps.org/pre/abstract/10.1103/PhysRevE.98.033309)",
      "source": "varbench@2024-10-22",
      "provenance": "imported"
    }
  ],
  "url": "https://qmbl.org/i/Heisenberg/square_50_P/",
  "per_site_divisor": 200,
  "per_site_label": "E/N (S.S)",
  "record": null,
  "no_record_reason": "solved exactly"
}