Optimum Unambiguous Discrimination Between Linearly Independent Symmetric States
Anthony Chefles, Stephen M. Barnett
Abstract
The quantum formalism permits one to discriminate sometimes between any set of linearly-independent pure states with certainty. We obtain the maximum probability with which a set of equally-likely, symmetric, linearly-independent states can be discriminated. The form of this bound is examined for symmetric coherent states of a harmonic oscillator or field mode.
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