Journal
PHYSICAL REVIEW A
Volume 66, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.66.022112
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We propose a programmable quantum device that is able to perform a specific generalized measurement from a certain set of measurements depending on a quantum state of a program register. In particular, we study a situation when the programmable measurement device serves for the unambiguous discrimination between nonorthogonal states. The particular pair of states that can be unambiguously discriminated is specified by the state of a program qubit. The probability of successful discrimination is not optimal for all admissible pairs. However, for some subsets it can be very close to the optimal value.
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