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The frontiers collection

The Basic Formalism and Interpretation of Decoherence

Published Jul 27, 2007• 0 citations
Publisher
DOI
10.1007/978-3-540-35775-9_2

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The role 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 a recent publication. 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.
The basic results are discussed in terms of quantum theory interpretations. The basic features of duality, entanglement, contextuality, and non-locality are inherent in all discussions. The wave-packet description of neutrons inside the interferometer combines particle features and properties of the apparatus. The formalism of quantum physics has been proven true, but the discussion about the interpretation of this theory is still ongoing. How a classical world may appear out of quantum features of nature is related to decoherence phenomena which exist in all parts of an experiment, but a final answer to this question cannot be given. One should be satisfied to have a very good description of the observed phenomena even though the interpretation of quantum theory remains ambiguous.