{
 "family": "heisenberg-2d-open",
 "description": "Open 4 x 4 square-lattice Heisenberg antiferromagnet (J = 1 on every nearest-neighbour bond) with random on-site Z fields drawn uniformly from [-1, 1], started from the Neel state. Observable: <Z_i>(t) on every site (row-major, site = x * Ly + y) at 41 times in [0, 10]. Total magnetisation is conserved. The scaling instance is a 6 x 6 lattice.",
 "hamiltonian": {
  "type": "heisenberg_2d",
  "J": 1.0,
  "field": {
   "dist": "uniform",
   "W": 1.0
  }
 },
 "initial_state": {
  "type": "neel"
 },
 "observable": {
  "pauli": "Z",
  "sites": "all"
 },
 "times": {
  "T": 10.0,
  "num": 41
 },
 "exact": {
  "size": [
   4,
   4
  ]
 },
 "scaling": {
  "size": [
   6,
   6
  ]
 },
 "budget_seconds": {
  "exact_suite": 240,
  "scaling": 240,
  "accuracy_probe": 60
 },
 "conserved": [
  "total_z"
 ],
 "score": {
  "metric": "mean_instance_max_abs_error",
  "round_for_display_only": true
 },
 "suite": {
  "version": "public-v2",
  "seeds": [
   20261013,
   20261014,
   20261015,
   20261016,
   20261017,
   20261018,
   20261019,
   20261020,
   20261021,
   20261022
  ],
  "source_independent": true
 },
 "accuracy_probe": {
  "size": [
   4,
   5
  ],
  "seed": 20261113
 }
}