[x̂_i, p̂_j] = iℏ δ_{ij}. Cornerstone of quantisation; underlies Heisenberg uncertainty and the ℏ → 0 classical limit (Poisson-bracket correspondence).
[x̂_i, p̂_j] = iℏ δ_{ij}. Cornerstone of quantisation; underlies Heisenberg uncertainty and the ℏ → 0 classical limit (Poisson-bracket correspondence).