This paper extends Vibrational Quantum Theory (VQT) to the macroscopic regime by formalizing the concept of "macroscopic decoherence stand-by". We demonstrate that an isolated macroscopic system (e.g., a room with no observers or measuring devices) does not require continuous environmental monitoring or external computational rendering to maintain a well-defined state. Instead, in the absence of local vibrational interactions, the system naturally enters a compressed informational regime characterized by null relational time and non-local propagation. The transition to classical, localized behavior occurs exclusively upon the establishment of a cross-entanglement channel with an external observer. The work clarifies the boundary conditions, thermodynamic implications, and geometric interpretation of this phenomenon, distinguishing it from both standard quantum decoherence and simulation-based hypotheses. This framework offers a physical mechanism for macroscopic latency and provides a foundation for further exploration of observer-dependent emergence in quantum and informational theories. Keywords: Vibrational Quantum Theory, Macroscopic Decoherence, Informational Compression, Relational Time, Quantum Stand-by, Stratified Superposition, Coherence Redistribution Additional notes: Independent theoretical work. No new experimental data. Builds upon previous papers in the VQT series.
This paper extends Vibrational Quantum Theory (VQT) to the macroscopic regime by formalizing the concept of "macroscopic decoherence stand-by". We demonstrate that an isolated macroscopic system (e.g., a room with no observers or measuring devices) does not require continuous environmental monitoring or external computational rendering to maintain a well-defined state. Instead, in the absence of local vibrational interactions, the system naturally enters a compressed informational regime characterized by null relational time and non-local propagation. The transition to classical, localized behavior occurs exclusively upon the establishment of a cross-entanglement channel with an external observer. The work clarifies the boundary conditions, thermodynamic implications, and geometric interpretation of this phenomenon, distinguishing it from both standard quantum decoherence and simulation-based hypotheses. This framework offers a physical mechanism for macroscopic latency and provides a foundation for further exploration of observer-dependent emergence in quantum and informational theories. Keywords: Vibrational Quantum Theory, Macroscopic Decoherence, Informational Compression, Relational Time, Quantum Stand-by, Stratified Superposition, Coherence Redistribution Additional notes: Independent theoretical work. No new experimental data. Builds upon previous papers in the VQT series.
Traditional formulations of quantum dynamics emphasize bulk evolution governed by unbounded differential operators. In this work, we introduce a unified operator-theoretic framework demonstrating that physical interaction, measurement, and macroscopic reality are fundamentally boundary-resolved phenomena. We define "boundary mechanics" as the spectral constraint structure governing admissible interactions across an interface, and "boundary dynamics" as the time evolution of interface-localized couplings. By embedding these concepts into bipartite open quantum systems (System-Bath architectures), we prove that classical macroscopic events emerge strictly as boundary-induced decoherence projections (einselection). Furthermore, we establish that dynamical coherence is preserved subject to a strict spectral admissibility condition, providing a necessary and physically robust sufficient criterion characterized by the non-vanishing of the regularized Birman-Schwinger determinant: D_boundary(z) = det2(I + K(z)) != 0. This work goes beyond standard decoherence theory by demonstrating that decoherence alone is insufficient as a criterion for classicality; it must be supplemented by a spectral stability condition at the interface. This yields a closed formalism in which macroscopic observable dynamics are governed entirely by spectrally admissible interface interactions, rigorously bridging Zurek's decoherence theory with the Kato-Rellich theorem and Birman-Schwinger perturbation theory.
This preprint examines macroscopic quantum systems, specifically superconducting qubits and SQUIDs within the framework of the Relativistic Coherent Vacuum Gravity Theory (rCVGT). Macroscopic quantum devices demonstrate that quantum coherence can persist in systems involving billions of electrons, occupying a regime traditionally viewed as intermediate between microscopic quantum physics and classical behavior. While standard quantum mechanics and superconducting circuit theory successfully describe these systems operationally, their existence raises foundational questions about the physical origin, stability, and breakdown of quantum coherence at macroscopic scales. In rCVGT, quantum coherence is interpreted as a physical property of a structured relativistic vacuum rather than as a purely abstract state-vector attribute. Within this perspective, macroscopic quantum states correspond to extended, low-entropy coherent vacuum configurations stabilized by superconducting order. Decoherence and measurement are interpreted as physical processes involving the degradation of vacuum coherence, consistent with (but ontologically deeper than) standard environment-induced decoherence descriptions. This work does not modify the operational form or experimentally validated predictions of quantum mechanics, superconducting circuit theory, or general relativity in the regimes considered. All standard results for qubits, SQUIDs, and macroscopic quantum tunneling remain unchanged. Instead, the paper provides a coherent physical interpretation that integrates macroscopic quantum phenomena with the vacuum-based ontology of rCVGT. The preprint is intended as a conceptual and interpretive supplement to the main rCVGT framework, clarifying how macroscopic quantum coherence, measurement, and classicality naturally fit into a vacuum-coherence-based description of gravity and spacetime. It stands independently, while supporting the broader rCVGT research program linking quantum mechanics, gravity, and emergent physical time.
This paper presents Vibrational Quantum Theory (VQT), a unified framework in which quantum behavior and gravitational phenomena emerge from the vibrational dynamics of a primordial string-like substrate. Information is understood not as primitive computational bits, but as relational patterns arising from interference, energy exchange, and redistribution among fundamental excitations. The theory introduces a Local Vibrational Field whose gradients shape spatial probability distributions, and an Internal Vibrational Encoding that governs the transition between wave-like and particle-like regimes. Wave-particle duality is reinterpreted as a consequence of temporal incompatibility: even minimal vibrational interference introduces relational time structures incompatible with the photon’s null proper time. The framework provides a complete reconstruction of the double-slit experiment from first principles and predicts upstream coherence effects. It extends naturally to black-hole horizons, where extreme vibrational interference triggers active decompositional dynamics. Quantum states are decomposed and redistributed across compatible layers according to a Coherence Redistribution Principle. Black holes are interpreted as cosmic cleaning and recombination nodes within the primordial vibrational substrate. All predictions are in principle falsifiable through precision interferometric and gravitational-wave observations.
Macroscopic quantum superpositions are widely believed to be unobservable because large systems cannot be perfectly isolated from their environments. Here, we show that even under perfect isolation, intrinsic unitary dynamics in generic many-body systems, as analyzed through the eigenstate thermalization hypothesis and random matrix theory, can suppress the observable signatures of macroscopic coherence. Using the Greenberger-Horne-Zeilinger (GHZ) state as a representative example, we demonstrate that while fully correlated measurements can initially distinguish a macroscopic superposition from its corresponding classical mixture, generic many-body evolution renders them operationally indistinguishable for most times. By analyzing both distinguishability measures and established quantifiers of macroscopic quantumness, we find that equilibration not only hides coherence from accessible observables but also suppresses the corresponding signatures of macroscopic quantumness, in particular within the additive-local framework considered here. These results identify unitary thermalization, independent of environmental decoherence, as a fundamental mechanism that limits the observation of macroscopic quantum effects.
Abstract: The quantum measurement problem has been the deepest conceptual difficulty since the birth of quantum mechanics. Standard quantum mechanics accepts wavefunction collapse as an independent postulate but never provides a physical explanation. The decoherence approach attributes collapse to the interaction between the system and its environment, but faces two fundamental limitations: the “infinite regress” problem and the “insufficiency of decoherence” problem. Within the framework of the Self-Construction Theory (SCT), this paper provides a complete resolution of the measurement problem. The core thesis is that quantum measurement is not a fundamental process independent of the laws of physical evolution, but rather a local manifestation of constructive renormalization—the scale evolution of the spacetime complex field K from microscopic degrees of freedom to macroscopic effective descriptions. The origins of wavefunction collapse, decoherence, and the Born rule receive a unified first‑principles interpretation in this framework. SCT’s spontaneous decoherence mechanism is the key to the resolution. Constructive renormalization inherently involves information loss—the integrated‑out microscopic degrees of freedom no longer exist in the macroscopic effective description. During a measurement, the measuring apparatus possesses a huge number (∼1023) of microscopic degrees of freedom. When the apparatus interacts with the measured system, constructive renormalization triggers information compression of these degrees of freedom—the apparatus can no longer distinguish which branch of the superposition it is in, and quantum coherence is thus spontaneously lost. No “external environment” is needed—the constructive renormalization dynamics of spacetime itself is the ultimate source of decoherence, thereby completely solving the “infinite regress” problem. Among the probability distribution given by the Born rule, the weights of non‑maximal probability branches are further suppressed by information compression under the huge number of microscopic degrees of freedom, so that macroscopic observers can perceive only a definite outcome in the effective description. The information loss caused by constructive renormalization is ontological—it does not rely on any approximation or truncation, thus fundamentally solving the “insufficiency of decoherence” problem. The Born rule—that measurement outcomes occur with probabilities given by the squared amplitudes—is directly derived from the constructive integral structure in SCT. In the constructive renormalization limit, interference terms between different configurations are naturally suppressed by off‑diagonal phase randomization, and the system automatically switches to a classical probabilistic description. In the diagonal density matrix representation, the squared amplitude is the only natural weight that is simultaneously real and non‑negative. Hence the Born rule is not an additional postulate of quantum mechanics but a necessary and unique manifestation of the relative frequencies of the constructive integral in the constructive renormalization limit. This derivation is rigorous within the mathematical framework of constructive renormalization—it does not rely on any approximations or truncations. SCT’s quantum measurement theory is deeply unified with the black hole information paradox. The “collapse” in quantum measurement and the “information loss” in black hole evaporation are different manifestations of the same core mechanism—the redistribution of information due to constructive renormalization—in two extreme physical situations. In quantum measurement, information is redistributed into the degrees of freedom of the macroscopic apparatus; in black hole evaporation, information is redistributed into the time‑point configurations on the horizon. This unification is the strongest proof of the universality of constructive renormalization as an information‑processing mechanism. Keywords: quantum measurement; spontaneous decoherence; constructive renormalization; Born rule; wavefunction collapse; information redistribution; Self-Construction Theory
Quantum entanglement and coherence, traditionally studied in microscopic systems, have recently been observed and manipulated in macroscopic platforms. These phenomena play a critical role in understanding the boundary between classical and quantum physics and in developing quantum technologies such as superconducting qubits, optomechanical resonators, and atomic ensembles. This article reviews theoretical models, numerical simulations, and experimental techniques used to probe entanglement and coherence in large-scale systems. Five thematic outlines are presented, with one outline including two graphs illustrating (i) time evolution of entanglement in a macroscopic oscillator system, and (ii) coherence decay under environmental coupling. Applications, limitations, and future directions are discussed to provide a comprehensive perspective.