منابع مشابه
Non-negative Observables Are Squares
For [S],1 whose notation and results we use without further comment, the question of whether or not a non-negative observable is the square of an observable is left open. Our positive solution of this question eliminates one of the hypotheses in a pair of propositions [S.Theorem4 and Corollary 4.1 ] in that paperand so nowwe knowthat without exception a pure state of a subsystem may be extended...
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ژورنال
عنوان ژورنال: Proceedings of the American Mathematical Society
سال: 1951
ISSN: 0002-9939
DOI: 10.2307/2032616