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The Role of Decoherence in Quantum Mechanics
The Role of Decoherence in Quantum Mechanics

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[Revised entry by Guido Bacciagaluppi on January 23, 2025.
Changes to: Main text, Bibliography, notes.html]
Interference phenomena are a well-known and crucial aspect of quantum mechanics, famously exemplified by the two-slit experiment. There are many situations, however, in which interference effects are artificially or spontaneously suppressed. The theory of decoherence is precisely the study of such situations. It is is relevant (or is claimed to be relevant) to a variety of questions ranging from the measurement problem to the arrow of time, and in particular to the…

Read the full article which is published on Stanford Encyclopedia of Philosophy (external link)

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