In
quantum Darwinism and similar theories, pointer states are
quantum states, sometimes of a measuring apparatus, if present, that are less perturbed by
decoherence than other states, and are the quantum equivalents of the classical states of the system after decoherence has occurred through interaction with the environment.
'Pointer' refers to the reading of a recording or measuring device, which in old analog versions would often have a
gauge or pointer display.
See also
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Einselection
In quantum mechanics, einselections, short for "environment-induced superselection", is a name coined by Wojciech H. Zurek
for a process which is claimed to explain the appearance of wavefunction collapse and the emergence of classical descripti ...
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Mott problem
In quantum mechanics, the Mott problem is a paradox that illustrates some of the difficulties of understanding the nature of wave function collapse and measurement in quantum mechanics. The problem was first formulated in 1929 by Sir Nevill Fran ...
References
Quantum mechanics
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