Structural Limits in Friedmann Cosmology

This record presents two related contributions to the ZIP framework addressing structural limits in fundamental physics. The primary paper, Structural Limits of Outcome Selection, examines a known residual problem in decoherence-based quantum measurement accounts: the physical selection of a single, definite outcome. While decoherence explains the suppression of interference through environmental entanglement, it does not on its own determine why one outcome is realized rather than merely isolated. This work introduces the ZIP perspective as a minimal, entropic complement to decoherence, preserving standard quantum dynamics while identifying irreversible stabilization as the mechanism governing outcome selection. The paper outlines how differences in entropic robustness can give rise to statistical outcome weights consistent with the Born rule and proposes minimal empirical conditions under which the ZIP interpretation could be distinguished. The companion contribution, Structural Limits in Friedmann Cosmology, applies the ZIP framework to classical cosmological dynamics. It shows that within the standard Friedmann equations, there exists structural degeneracy between additional matter–energy components and large-scale informational coherence effects. A defined ZIP-limit marks the regime beyond which observational data cannot uniquely discriminate between substance-based and structure-based interpretations of cosmic expansion. Together, these papers illustrate how the ZIP approach clarifies interpretative boundaries in quantum and cosmological contexts without modifying underlying dynamical formalisms. This work is part of the ZIP (Zonal Informational Physics) framework, which studies structural constraints on physical descriptions rather than proposing new dynamical entities.