{
  "artifact_id": "qft.artifact.quantum-information.free-scalar-mass-quench-growth",
  "claim_boundary": "Exact finite-lattice Gaussian entropy for the frozen sudden quench; the size collapse is a regulated large-interval diagnostic, not a continuum extrapolation or a universal chaotic entanglement velocity.",
  "controls": {
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        "absolute_difference": 1.099120794378905e-14,
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        "independent_XP_entropy": 0.2709519021658803
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      "24": {
        "absolute_difference": 1.9984014443252818e-15,
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      "32": {
        "absolute_difference": 3.552713678800501e-14,
        "cholesky_symplectic_entropy": 0.27095190216584575,
        "independent_XP_entropy": 0.2709519021658813
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    },
    "no_quench_maximum_absolute_delta_entropy": 7.099876242477876e-14,
    "pure_state_complement_entropy_check": {
      "absolute_difference": 2.042810365310288e-14,
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      "complement_length": 12.0,
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      "time": 1.3
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      "conclusion": "A short coherent transient can look locally linear while its fitted slope and normalized velocity proxy change sign or exceed the carrier speed; it does not license a transport velocity. The parameter-free full-curve comparison survives.",
      "fit_model": "Delta S_A(t)=intercept+slope*t",
      "fits": [
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    "volume_and_cutoff": {
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        "maximum_L224_vs_L192_absolute_difference": 1.8252066524837574e-13,
        "maximum_L224_vs_L192_fraction_of_stationary_volume_term": 6.527061766564216e-14,
        "maximum_a020_vs_a025_absolute_difference": 0.01712242001155717,
        "maximum_a020_vs_a025_fraction_of_stationary_volume_term": 0.0061230925745534666
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      "24": {
        "maximum_L224_vs_L192_absolute_difference": 3.5438318946034997e-13,
        "maximum_L224_vs_L192_fraction_of_stationary_volume_term": 8.448654160126918e-14,
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        "maximum_L224_vs_L192_fraction_of_stationary_volume_term": 6.717632913033244e-14,
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    },
    "volume_residual_figure": {
      "deliberate_small_volume_length": 128.0,
      "deliberate_small_volume_residual_at_time_max": -0.6196966366279968,
      "deliberate_small_volume_return_bound": 54.37368942964119,
      "figure_interval_length": 32.0,
      "large_volume_length": 224.0,
      "maximum_absolute_large_volume_residual": 7.327471962526033e-13
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    "zero_mode_exact_slice": {
      "P_k0": 0.6250000000000001,
      "R_k0": 0.37500000000000006,
      "X_k0": 0.6250000000000001,
      "determinant": 0.2500000000000001,
      "expected_R": 0.375,
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  "conventions": {
    "boundary_condition": "periodic",
    "canonical_commutator": "[q_n,p_m]=i delta_nm",
    "entropy_units": "nats",
    "hamiltonian": "H=1/2 sum_n[p_n^2+(q_(n+1)-q_n)^2/a^2+m^2 q_n^2]",
    "logarithm": "natural",
    "observable": "Delta S_A(t)=S_A(t)-S_A(0)",
    "quench": "exact ground state of H(m_i) at t=0-; sudden evolution with H(m_f) at t=0",
    "symplectic_form_order": "all q coordinates followed by all p coordinates"
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        "first_ninety_percent_stationary_volume_term_time": 28.978980515400345,
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    "maximum_cross_size_absolute_entropy_spread_in_early_window": 3.185229857649574e-13,
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    "stationary_mode_entropy_density": 0.17477299872448282
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  "files": {
    "csv": "public/figures/quantum-information/free-scalar-mass-quench-growth.csv",
    "generator": "figures-src/quantum-information/generate-free-scalar-mass-quench-growth.py"
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}