Lieb–Robinson velocity: v_LR = 2·s·J and bound ‖[A(t),B]‖ ≤ C·exp((v·t − d/ξ))

Lieb–Robinson velocity bound: for a local Hamiltonian with single-site operator norms ‖h_i‖ ≤ s and hopping/interaction amplitude J, the emergent propagation velocity is v_LR ≤ 2·s·J. The commutator ‖[A(t),B]‖ with operators separated by d…