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Bound on measurement based on the no-signaling condition

Barnett, S.M. and Andersson, E. (2002) Bound on measurement based on the no-signaling condition. Physical Review A, 65 (4). 044307-044307. ISSN 1094-1622

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We obtain a tight bound on the measurement which discriminates without error between two nonorthogonal states. The derivation is based on the no-signaling condition, without any reference to generalized measurements.