Difference between revisions of "Store:QLMen08"

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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 name=":Ozawa M. Uncertainty"/> 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 measurements
Uncertainty relations for noise and disturbance in generalized quantum measurements
Ann. Phys., NY, 311 (2004), pp. 350-416  
Ann. Phys., NY, 311 (2004), pp. 350-416</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   
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