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The research aims to clarify the role of measurement in quantum theory, challenging the assumption that decoherence can substitute for measurement.

July 30, 2026Open Access

Why Decoherence Cannot Replace Measurement: Outcome-Resolved Dynamics Without a Fundamental Measurement Postulate in Modal Triplet Theory

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Demonstrates the limitations of decoherence in predicting outcomes in quantum mechanics, suggesting alternative models.

The research aims to clarify the role of measurement in quantum theory, challenging the assumption that decoherence can substitute for measurement.
Analyzed measurement as a system-apparatus-environment process rather than as a fundamental observer act.
Proved pointer dephasing as a nonselective completely positive trace-preserving channel in finite-dimensional quantum theory.
Explored the implications of distinct outcome instruments with varying probability laws on decoherence models.
Established that decoherence alone does not determine recorded outcomes or their probabilities.
Showed that an MTT (Modal Triplet Theory) basin boundary does not select successor basins.
Identified the need for a complete outcome-resolved model involving an instrument and its source.

Peter Nero (2026) studied this question.

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