The Ladder of Isomorphism I: Topological Order as the Physical Realization of Always-Isomorphism — Long-Range Entanglement, Ground-State Degeneracy, and Convergence of the Generative Kernel
changzheng zhou, ZIQING zhou
This paper demonstrates that topological order constitutes a rigorous physicalrealization of the always-isomorphism proposition in quantum many-body systems.The always-isomorphism proposition, introduced as a cross-scale structural convergence hypothesis, asserts that for systems satisfying hierarchical generative structure and information conservation conditions, although the generative origin andthe evolutionary terminus are maximally separated in the superficial causal chain,they must converge in deep topology onto the same generative kernel. We firstestablish a formal framework and physical interpretation of this hypothesis, clearlydistinguishing three processes: renormalization group flow, dynamical time evolution, and adiabatic deformation, and a priori delineate three failure boundaries:gap closing, non-unitary environment coupling, and short-range entanglement. Onthis basis, we prove that the ground-state degeneracy stability, rigidity of longrange entanglement, and modular invariance of the anyon modular tensor categoryof topological order exactly correspond to the rigorous physical versions of the threenecessary conditions for always-isomorphism. By decomposing the theorem into anRGconvergence theorem and a dynamical preservation theorem, we eliminate conceptual confusion and provide a complete categorical equivalence proof. The toriccode model and the fractional quantum Hall effect serve as concrete examples showing the precise correspondence among the generative origin, evolutionary terminus,and deep generative kernel. Failure analysis reveals gradual failure behavior in thecritical region, offering feasible schemes for experimental testing. We conclude thatthe relationship between topological order and always-isomorphism is not an accidental analogy but a necessary coincidence of deep structures — topological orderprovides a mapping channel from category theory to condensed matter physics foralways-isomorphism, while always-isomorphism provides a genetic interpretationin the temporal dimension and hierarchical structure for topological order.
•May 20, 2026•0 citations