Optimal unambiguous state discrimination of two density matrices: A second class of exact solutions
نویسندگان
چکیده
منابع مشابه
Optimal unambiguous discrimination of two subspaces as a case in mixed state discrimination
We show how to optimally unambiguously discriminate between two subspaces of a Hilbert space. In particular we suppose that we are given a quantum system in either the state |ψ1〉, where |ψ1〉 can be any state in the subspace S1, or |ψ2〉, where |ψ2〉 can be any state in the subspace S2, and our task is to determine in which of the subspaces the state of our quantum system lies. We do not want to m...
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In this paper we consider the problem of unambiguous discrimination between a set of linearly independent pure quantum states. We show that the design of the optimal measurement that minimizes the probability of an inconclusive result can be formulated as a semidefinite programming problem. Based on this formulation, we develop a set of necessary and sufficient conditions for an optimal quantum...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2007
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.76.052322