Set discrimination of quantum states
- Publication Type:
- Journal Article
- Citation:
- Physical Review A - Atomic, Molecular, and Optical Physics, 2002, 65 (6), pp. 5 - ?
- Issue Date:
- 2002-01-01
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We introduce a notion of set discrimination, which is an interesting extension of quantum state discrimination. A state is secretly chosen from a number of quantum states, which are partitioned into some disjoint sets. A set discrimination is required to identify which set the given state belongs to. Several essential problems are addressed in this paper, including the condition of perfect set discrimination, unambiguous set discrimination, and in the latter case, the efficiency of the discrimination. This generalizes some important results on quantum state discrimination in the literature. A combination of state and set discrimination and the efficiency are also studied. © 2002 The American Physical Society.
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