Validation

Numerical validation is organized around independent checks of the algebra, basis construction, Hamiltonian action, and eigensolution. Analytic few-body models test several layers at once, while direct comparisons between sparse and matrix-free actions test numerical representations without relying on a particular physical spectrum.

Performance measurements are kept separate from correctness because absolute timings and memory usage depend on the machine, thread configuration, optional compiled execution, and the physical workload.

• Correctness
  • Operator algebra and sectors
  • Analytic Hubbard dimer
  • Constrained Schwinger-boson spin space
  • Independent Hamiltonian actions
  • Eigensolver residuals
• Performance validation
  • Matrix-free thread scaling
  • Other performance dimensions