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Comm. Math. Phys., 17 (1970), pp. 239-260 | Comm. Math. Phys., 17 (1970), pp. 239-260 | ||
View Record in ScopusGoogle Scholar</ref> Ozawa, 1984<ref name=":0" />) quantum instrument or simply quantum instrument. As we shall see in Section 4, complete positivity is a sufficient condition for an instrument to be physically realizable. On the other hand, necessity is derived as follows (Ozawa, 2004).<ref>Ozawa M. | View Record in ScopusGoogle Scholar</ref> Ozawa, 1984<ref name=":0" />) quantum instrument or simply quantum instrument. As we shall see in Section 4, complete positivity is a sufficient condition for an instrument to be physically realizable. On the other hand, necessity is derived as follows (Ozawa, 2004).<ref>Ozawa M. Uncertainty relations for noise and disturbance in generalized quantum measurementsAnn. Phys., NY, 311 (2004), pp. 350-416. Google Scholar</ref> | ||
Uncertainty relations for noise and disturbance in generalized quantum | |||
Google Scholar</ref> | |||
Every observable <math display="inline">A</math> of a system <math display="inline">S</math> is identified with the observable <math display="inline">A\otimes I</math> of a system <math display="inline">S+S'</math> with any system <math display="inline">S'</math> external to<math display="inline">S</math> .10 | Every observable <math display="inline">A</math> of a system <math display="inline">S</math> is identified with the observable <math display="inline">A\otimes I</math> of a system <math display="inline">S+S'</math> with any system <math display="inline">S'</math> external to<math display="inline">S</math> .10 | ||