The Variational Method
unseel.com · ⟨H⟩ ≥ E₀ · Rayleigh-Ritz · Trial wavefunction
Trial ⟨H⟩
True E₀ −0.500
Gap
state standby
Trial wavefunction ψ(α)
Potential well V(x)
True ground state E₀
Trial energy ⟨H⟩
Unseel.com · The Variational Method