作者: G. M. D'Ariano , H. P. Yuen
DOI: 10.1103/PHYSREVLETT.76.2832
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摘要: The general impossibility of determining the state a single quantum system is proved for arbitrary measuring schemes, including succession measurements. Some recently proposed methods are critically examined. A scheme tomographic measurements on copy radiation field devised, showing that perturbed however weak system-apparatus interaction is, due to need preparing apparatus in highly ``squeezed'' state.