Phys. Rev. A 69, 034101 (2004) [2 pages]Classical limit of von Neumann measurementReceived 23 October 2003; published 1 March 2004 We show that, in the context of von Neumann measurement theory, the condition of strong measurement is the classical limit of the measuring device, and vice versa. This means that a strong measurement can be performed only by using a measuring device prepared in a classical limit state, and vice versa. Since it is the strong measurement that conforms with the postulate that the outcome of a single measurement is one of the eigenvalues of the corresponding operator, the aforementioned postulate is valid only in the classical limit for a von Neumann measurement. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.69.034101
DOI:
10.1103/PhysRevA.69.034101
PACS:
03.65.Ta
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