Measurement does not always aid state discrimination

Details Measurement does not always aid state discrimination Measurement does not always aid state discrimination

2002-11-22

arxiv.org/abs/quant-ph/0211148v1

Physics

Quantum Physics

3 pages

Scientific paper

10.1103/PhysRevA.68.012306

We have investigated the problem of discriminating between nonorthogonal
quantum states with least probability of error. We have determined that the
best strategy for some sets of states is to make no measurement at all, and
simply to always assign the most commonly occurring state. Conditions which
describe such sets of states have been derived.

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