Irreversibility and Quantum Measurement
Abstract
Therole played by irreversible processes, at the microscopic scale, in several examples of quantum measurements is studied within a “minimally realist” interpretation of the quantum formalism introduced in J. Gea-Banacloche, APS Open Sci. 1, 000039 (2026). The analysis extends and confirms the basic results of the earlier work: separation of the collapse and amplification phases of the measurement, and decoherence and collapse happening already as a consequence of irreversible microscopic processes at the level of the “probe” itself (typically an atom in the examples considered). Additionally, the proposed interpretation of the formalism is shown to be consistent with previous interpretations, and a case for true irreversibility in physics is argued in some detail.
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