Measurements of Observables Replaced by "Detections" in Quantum Theory
Abstract
In Quantum Physics it is not always possible to directly perform the measurement of an obsevable; in some of these cases, however, its value can be detected, i.e. it can be inferred by measuring another observable characterized by perfect correlation with the observable of interest. Though a detection is often interpreted as a measurement of the detected observable, we prove that the two concepts cannot be identified in Quantum Physics. Furthermore, we establish what meaning and role can be ascribed to detections coherently with Quantum Theory.
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