Discretisation

How a continuous radial coordinate becomes a finite matrix, and how the grid is chosen rather than guessed.

• FEM-DVR-ECS: finite-element DVR with exterior complex scaling
• The N-dimensional tensor-product Hamiltonian
• FEM-DVR-ECS discretisation tuner: design, calibration, and gate

• FEM-DVR-ECS: finite-element DVR with exterior complex scaling — the FEM-DVR grid with an exterior-complex-scaled tail, and the four analytic benchmarks that pin it down.

• The N-dimensional tensor-product Hamiltonian — the N-dimensional sparse tensor Hamiltonian.

• FEM-DVR-ECS discretisation tuner: design, calibration, and gate — deriving a grid from the potential instead of hand-picking element lengths, and where the 1-D probes are not sufficient.