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Difference between revisions of "Store:QLMen08"
→3.4. General theory (Davies–Lewis–Ozawa)
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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 | 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 name=":Ozawa M. Uncertainty" /> | ||
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 | ||