This registration documents a completed theoretical study in fundamental physics and statistical mechanics. The work introduces a universal, model-independent stability criterion for the applicability of object-based descriptions in physical theories. Objecthood is treated not as an ontological primitive, but as an operationally defined regime characterized by (i) a separation of characteristic timescales and (ii) the capacity to support persistent internal records under coarse-grained observation. A dimensionless stability parameter is defined as the ratio between the exit time from a coarse-grained state and the intrinsic relaxation time of the system. The central result is the identification of a sharp threshold below which identity-based language (localization, persistence, re-identification) becomes physically uncontrolled, independently of microscopic dynamics. The registration serves to time-stamp and formally fix the theoretical formulation, definitions, assumptions, and conclusions presented in the associated preprint. No data collection, experimental intervention, or hypothesis testing is planned. The results are normative rather than predictive: they do not modify equations of motion but constrain the domain of physical validity of object-based descriptions across classical, quantum, and relativistic regimes. This registration is intended to establish priority and transparency for a foundational theoretical contribution at the interface of statistical mechanics, quantum foundations, and information theory.
This registration documents a completed theoretical study in fundamental physics and statistical mechanics. The work introduces a universal, model-independent stability criterion for the applicability of object-based descriptions in physical theories. Objecthood is treated not as an ontological primitive, but as an operationally defined regime characterized by (i) a separation of characteristic timescales and (ii) the capacity to support persistent internal records under coarse-grained observation. A dimensionless stability parameter is defined as the ratio between the exit time from a coarse-grained state and the intrinsic relaxation time of the system. The central result is the identification of a sharp threshold below which identity-based language (localization, persistence, re-identification) becomes physically uncontrolled, independently of microscopic dynamics. The registration serves to time-stamp and formally fix the theoretical formulation, definitions, assumptions, and conclusions presented in the associated preprint. No data collection, experimental intervention, or hypothesis testing is planned. The results are normative rather than predictive: they do not modify equations of motion but constrain the domain of physical validity of object-based descriptions across classical, quantum, and relativistic regimes. This registration is intended to establish priority and transparency for a foundational theoretical contribution at the interface of statistical mechanics, quantum foundations, and information theory.
This work introduces a formal and model-independent criterion for the applicability of object-based descriptions in physics. Objecthood is defined operationally as the structural stability of coarse-grained macrostates under microscopic dynamics, quantified through statistical distance and separation of characteristic timescales. The framework is normative rather than predictive: it does not introduce new physical laws, but clarifies when object-based language is justified and when it necessarily breaks down. An explicit example demonstrates how the abstract stability criterion connects to concrete dynamical parameters without committing to a specific model. The results provide a diagnostic foundation for analyzing limiting regimes in statistical mechanics, quantum theory, and the foundations of physical description. Related work: Onishchuk, Y. Conditions of Objecthood: A Structural Analysis of Energy and Physical States. OSF Registration. DOI: 10.17605/OSF.IO/3FHTC
This project presents a structural and normative analysis of the conditions under which an object-based descriptive language is physically applicable. Rather than proposing new dynamical laws or models of mass generation, the work identifies minimal structural criteria required for interpreting physical states as objects, understood operationally as localized, temporally persistent entities with internal structure. Key concepts include microstate capacity as a measure of internal structural multiplicity, the role of relativistic kinematics in distinguishing lightlike and timelike excitations, and the separation between propagating correlations and object-like states. The analysis is model-independent and applies across classical, quantum, and relativistic regimes. Its conclusions are intended as constraints on interpretation rather than as causal explanations.
The definition of entropy in both classical and quantum contexts relies on a coarse-graining of the underlying microscopic description. While this dependence is widely acknowledged, the physical constraints that determine which coarse-grainings are admissible are rarely made explicit. This issue becomes particularly acute when the universe is treated as a closed system, where no external observer or privileged level of description can be assumed. Any characterization of entropy — including claims about the low-entropy initial conditions of the universe — must then be grounded in descriptions that can be physically instantiated from within the system itself. In this work, we introduce a rigorous operational framework that establishes explicit physical selection principles over the space of admissible descriptions. We organize these criteria into necessary conditions (local accessibility and physical implementation via internal interactions) and practical sufficiency conditions (finite resource requirements anchored in Landauer’s principle, dynamical stability, and effective consistency). To demonstrate the validity of our framework, we introduce a concrete one-dimensional spin-chain toy model, illustrating how mathematically valid global partitions fail to be physically realizable due to dynamic propagation limits and informational constraints. We analyze the far-reaching implications of this restriction across three domains. In classical statistical mechanics, it limits the arbitrariness of macrostate definitions. In quantum theory, it identifies environment-induced decoherence (einselection) not merely as a formal tool, but as the objective dynamical mechanism that forces the emergence of admissible internal partitions. In cosmology, it resolves foundational circularities in the quasi-classical histories framework and reframes the thermodynamic arrow of time as a "doubly relational" property—dependent both on cosmic boundary conditions and on the material limits of internal subsystems. Our framework clarifies the operational status of entropy as an emergent property of physically instantiated descriptions within a universe that observes itself.
This preprint introduces the Persistence Criterion (PC), a conceptual and mathematical framework for distinguishing epistemic obscuration from ontological elimination in physical theories. The central claim is that uncertainty, noise, decoherence, or coarse-graining reduce empirical distinguishability of states or observables without implying that the underlying theoretical structures cease to exist. The framework is developed across classical estimation theory, stochastic dynamical systems, and quantum theory. In the classical domain, noisy observation models and information-theoretic metrics are used to show how distinguishability contracts while state variables persist, consistent with standard treatments in estimation theory and statistical physics (e.g., Fisher information and Bayesian filtering). For dynamical systems, stochastic differential equations and Fokker–Planck dynamics illustrate how deterministic generators remain structurally present despite diffusion-dominated behavior, aligning with established results in open-system dynamics and control theory. In the quantum domain, the Persistence Criterion is formulated using density operators, completely positive trace-preserving (CPTP) maps, and the algebraic (C*-algebraic) formulation of quantum mechanics. Decoherence is treated as an obscuring process acting on states via CPTP channels, while the underlying observable algebra remains invariant. This formulation draws on standard results from quantum information theory and algebraic quantum mechanics, emphasizing that loss of coherence or distinguishability does not entail annihilation of observables or dynamical structure (Holevo, 2011; Nielsen & Chuang, 2010; Breuer & Petruccione, 2002). The Persistence Criterion is interpretation-neutral and consistent with quantum no-go theorems, including Bell, Kochen–Specker, and PBR-type results, as it makes no assumption of value definiteness or hidden variables. Instead, it functions as a criterion of ontological coherence, identifying and excluding a specific interpretational error: the conflation of indistinguishability with non-existence. The work is aligned with non-eliminative structural realism and contemporary discussions of decoherence and ontology in quantum foundations (Ladyman & Ross, 2007; Wallace, 2012; Ruetsche, 2018). No new physical dynamics or empirical predictions are proposed. The contribution is conceptual and formal: clarifying how existing mathematical frameworks already encode persistence under uncertainty, and providing a principled interpretational constraint applicable across classical and quantum theories.
This document is part of the Informational Mechanics (IM) framework and is published in the IM-E (Measurement & Operators) series within the IM v0.3 corpus. The paper formalizes an Operator Stability Condition (OSC) that specifies when quantum-mechanical observables exhibit regime-stable invariance under admissible disturbance. Rather than introducing new dynamics or modifying quantum theory, the analysis provides a structural criterion for when operator-defined quantities become persistently comparable and support classical description. Classical emergence is treated as a consequence of operator stability: when observables retain invariant content under admissible measurement and environmental interaction, effective classical structure arises without invoking collapse models, hidden variables, or additional ontological assumptions. The paper introduces no new axioms, dynamical mechanisms, or empirical fits. Its purpose is operational and disciplinary: to clarify the admissibility conditions under which classical description remains scientifically meaningful and to connect foundational admissibility constraints (IM-C series) with downstream structural consequences (IM-D series).
This project presents a conceptual and mathematical investigation into the relationship between uncertainty, distinguishability, and the ontological persistence of physical variables. Rather than treating uncertainty as a mechanism that alters or destroys underlying system states, the work develops a formal framework in which uncertainty acts as an obscuring layer that limits epistemic access while leaving fundamental structure intact. Using tools from information theory, stochastic dynamics, and quantum state evolution, the study introduces a Persistence Criterion that distinguishes between genuine ontological change and mere loss of distinguishability. The framework is applied across classical noise models, feedback-controlled systems, and quantum decoherence processes to demonstrate that contraction of information measures does not imply elimination of underlying states. The project aims to clarify common interpretational confusions in physics and complex systems, particularly in contexts involving strong noise, coarse-graining, and measurement limits. It is intended as a foundations-oriented contribution, with relevance to physical modeling, control theory, and the philosophy of uncertainty.