Phys. Rev. A 65, 022110 (2002) [6 pages]Minimum number of photons needed to distinguish two transparenciesReceived 22 May 2001; published 16 January 2002 We give a bound on the minimum number of photons that must be absorbed by any quantum protocol to distinguish between two transparencies. We show how a quantum Zeno method in which the angle of rotation is varied at each iteration can attain this bound in certain situations. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.65.022110
DOI:
10.1103/PhysRevA.65.022110
PACS:
03.65.Ta
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