=== 1D Schrodinger Solver (atomic units) ===
E = 0.5 Ha,  L = 10.0,  nx = 2000
Boundary condition: asymptotic
[INFO] step=200, x=-7.999, psi=6.396e+01
[INFO] step=400, x=-5.998, psi=7.702e+07
[RESULT] diverged at x=-5.118
psi(end) = 9.756e+09
[INFO] Data saved to schrodinger.xlsx