Article: Indeterminism

Indeterminism


In quantum mechanics there is deterministic evolution only of the wave function describing a situation: The present state of the wave function determines its future state uniquely and completely. However, the wave function is not directly observable. It determines the probability that measurements will have particular outcomes. This probabilistic aspect is not a consequence of an incomplete description, loss of information, or imperfect observing equipment. It is intrinsic to the nature of quantum reality. It is a manifestation of the limits of classical concepts, such as position, momentum, and energy that are used to describe nature.

The standard interpretation of ...

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