Measurements of observables replaced by "evaluations" in Quantum Theory

7th International Workshop DICE2014 Spacetime – Matter – Quantum Mechanics

物理学;力学

Nisticò, Giuseppe^1 ; Sestito, Angela^1

Dipartimento di Matematica, Università della Calabria, Italy and INFN - gruppo collegato di Cosenza, Italy^1

关键词: Direct measurement;    Measurements of;    Quantum physics;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/626/1/012049/pdf
DOI  :  10.1088/1742-6596/626/1/012049

学科分类：力学，机械学

来源: IOP

【 摘 要 】

In quantum physics there are circumstances where the direct measurement of particular observables encounters difficulties; in some of these cases, however, its value can be evaluated, i.e. it can be inferred by measuring another observable characterized by perfect correlation with the observable of interest. Though an evaluation is often interpreted as a measurement of the evaluated observable, we prove that the two concepts cannot be identified in quantum physics, because the identification yields contradictions. Then, we establish the conceptual status of evaluations in Quantum Theory and the role can be ascribed to them.