{
 "family": "tfim-chain-longitudinal",
 "description": "Open transverse-field Ising chain, H = -J sum Z_i Z_{i+1} - hx sum X_i - sum hz_i Z_i with J = 1, hx = 1 and random longitudinal fields hz_i drawn uniformly from [-0.5, 0.5] (non-integrable), started from a random Z-basis product state with independently sampled spins, each up with probability 0.5. Observable: <Z_i>(t) on every site at 41 times in [0, 20]. Total Z magnetisation is not conserved. Energy is conserved by the time-independent Hamiltonian but is not gated here.",
 "hamiltonian": {
  "type": "tfim_chain_longitudinal",
  "J": 1.0,
  "hx": 1.0,
  "hz": {
   "dist": "uniform",
   "W": 0.5
  }
 },
 "initial_state": {
  "type": "random_product_z",
  "p_up": 0.5
 },
 "observable": {
  "pauli": "Z",
  "sites": "all"
 },
 "times": {
  "T": 20.0,
  "num": 41
 },
 "exact": {
  "size": 18
 },
 "scaling": {
  "size": 32
 },
 "budget_seconds": {
  "exact_suite": 240,
  "scaling": 240,
  "accuracy_probe": 60
 },
 "conserved": [],
 "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": 20,
  "seed": 20261113
 }
}