ψ(x,t) = ψ(x,0) × e^(i(2π/λ)(E/h) t)
∫ψ(x,t) dx = ∫ψ(x,0) dx
ΔE = hf
And that's not even getting into entanglement... Learn more about entanglement
Or if you're feeling really adventurous, try to apply wave functions to your cat