Identification and Distance Measures of Measurement Apparatus

Details Identification and Distance Measures of Measurement Apparatus Identification and Distance Measures of Measurement Apparatus

2006-01-13

arxiv.org/abs/quant-ph/0601090v2

Phys. Rev. Lett. 96, 200401 (2006)

Physics

Quantum Physics

5 pages, RevTeX, 1 figure. Revised version with more examples and a reorganization of the contents

Scientific paper

10.1103/PhysRevLett.96.200401

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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