Decoherence in an Isolated Macroscopic Quantum System: A Parameter-Free Model Involving Gravity

Joy Christian

It is pointed out that the Diósi-Penrose ansatz for gravity-induced quantum state reduction can be tested by observing oscillations in the flavor ratios of neutrinos originating at cosmological distances. Since such a test would be almost free of environmental decoherence, testing the ansatz by means of a next generation neutrino detector such as IceCube would be much cleaner than by experiments proposed so far involving superpositions of macroscopic systems. The proposed microscopic test would also examine the universality of the superposition principle at unprecedented cosmological scales.

Martine Schut

Piotr Marecki

Joy Christian

It is pointed out that the Diosi-Penrose ansatz for gravity-induced quantum state reduction can be tested by observing oscillations in the flavor ratios of neutrinos originated at cosmological distances. Since such a test would be almost free of environmental decoherence, testing the ansatz by means of a next generation neutrino detector such as IceCube would be much cleaner than by experiments proposed so far involving superpositions of macroscopic systems. The proposed microscopic test would also examine the universality of superposition principle at unprecedented cosmological scales.

Steen Møller Nielsen

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.

Walter T. Strunz