Phase Drift Propagation

Phase Drift Propagation is the BPT counterpart of heat flow: the spread of phase gradients through the substrate, written ∇φ, standing where classical thermodynamics has heat transfer. The book sets up a direct correspondence between classical thermodynamics and computational measures: temperature becomes recursive tension density, heat flow becomes phase drift propagation, and free energy becomes available computational capacity. Heat moving from hot to cold is thus read as phase differences moving through the lattice as Pulse units drift out of alignment. That drift is what BPT calls entropy, so phase drift propagation is the process by which the substrate moves toward the phase-neutral Computational Null State, which triggers renewal rather than heat death. The book's correspondence table gives it the dimension of a phase gradient, [𝕃⁻¹]. Phase Drift Propagation connects to BPT Temperature Analog, Phase Coherence Probabilities, Characteristic Drift Time Scale, Computational Null State, Cosmic Renewal Engine and Entropy Accumulation.