CTQW evolves via U(t) = exp(−iHt) where H = γA is the adjacency matrix. Unlike classical random walks, quantum amplitude interferes. The spectral decomposition H|λ⟩=λ|λ⟩ gives P(j,t) = |Σₖ ⟨j|λₖ⟩ e^{−iλₖt} ⟨λₖ|start⟩|².