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Identification and Distance Measures of Measurement Apparatus

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arxiv quant-ph/0601090 v2 pith:7A6JKO4H submitted 2006-01-13 quant-ph

Zhengfeng Ji , Yuan Feng , Runyao Duan , Mingsheng Ying This is my paper · ORCID
classification quant-ph
keywords identificationapparatusdistancemeasurementmeasuresschemesappropriatelybrief
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We propose simple schemes that can perfectly identify projective measurement apparatus secretly chosen from a finite set. Entanglements are used in these schemes both to make possible the perfect identification and to improve the efficiency significantly. A brief discussion on the problem of how to appropriately define distance measures of measurements is also provided based on the results of identification.

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