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.
- quantum physics
- pure states
- linearly independent states
Chefles, A., & Barnett, S. M. (1998). Optimum unambiguous discrimination between linearly independent symmetric states. Physics Letters A, 250(4), 223-229. https://doi.org/10.1016/S0375-9601(98)00827-5