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A Spectral-Commutator Criterion for Quantum Legitimacy

A. Kim

Published Apr 9, 2026• 0 citations
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Abstract

We formalize an algebraic criterion to distinguish operationally transverse quantum mechanisms from spectrally trivial extensions. We establish a strict topological distinction between admissibility, precision, and exactness in constraint-preserving dynamical systems. Precision is strictly defined as invariant-preserving evolution, while exactness is the zero-residual realization of the invariant target manifold. Spectral gap preservation and a nonvanishing regularized determinant (det₂) are shown to provide the necessary physical stabilization conditions for the convergence of precise dynamics to exact states. By mapping commutator annihilation to Noetherian closure via an Ω-Σ (Omega-Sigma) refinement flow, we prove that legitimate quantum mechanisms must exhibit a bipartite algebraic structure: effective transversality followed by exact commutator annihilation. We further demonstrate that this Noetherian closure is equivalent to a degenerate Floquet regime, where stroboscopic quasi-energy bands collapse onto an idempotent structural projection. The resulting framework provides a closed description of admissible operator evolution. It establishes the Non-Negotiability Principle, which proves that non-structural inputs—such as observer preference—cannot perturb governing dynamics. Ultimately, we demonstrate that unconstrained dynamics do not natively converge to exactness; structural preservation via commutator annihilation is a necessary algebraic condition for admissible operator evolution, providing a mathematical razor to separate genuine quantum advantage from spectrally inert heuristics.

DOI
10.5281/zenodo.19479396

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We establish a necessary condition for quantum heuristics to achieve nontrivial computational advantage relative to a classical problem generator A. We prove that any unitary procedure whose dynamics nearly commute with A is spectrally confined: its ability to transfer amplitude across separated spectral sectors is bounded strictly by the commutator defect divided by the spectral gap. This yields a quantitative operator-theoretic obstruction to global state-space exploration. Consequently, repeated application of such procedures (e.g., in deep variational circuits) produces apparent algorithmic activity without generating meaningful information gain. We classify this regime as a "degenerate quantum heuristic". We apply this framework to Variational Quantum Eigensolvers (VQE) and the Quantum Approximate Optimization Algorithm (QAOA), demonstrating that circuit depth cannot overcome transversality failure. The theoretical results are fully closed within trace-ideal (S₂) operator theory. We extend the spectral confinement bound to the entire resolvent geometry, proving that degenerate heuristics preserve the Birman-Schwinger kernel and regularized Fredholm determinants (det₂), thereby mathematically obstructing any computational phase transition or new eigenvalue emergence. Finally, we demonstrate that genuine quantum speedup requires structural noncommutativity, which can be deterministically enforced via an Ω-Σ dissipative control layer. The manuscript includes complete finite-dimensional numerical validation, exhibiting the exact quantitative rigidity between commutator defect, spectral transport, and resolvent deformation.
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