Optimal quantum state estimation with use of the no-signaling principle

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A simple derivation of the optimal state estimation of a quantum bit was obtained by using the no-signaling principle. In particular, the no-signaling principle determines a unique form of the guessing probability independent of figures of merit, such as the fidelity or information gain. This proves that the optimal estimation for a quantum bit can be achieved by the same measurement for almost all figures of merit.
Publisher
AMER PHYSICAL SOC
Issue Date
2010-12
Language
English
Article Type
Article
Keywords

INFORMATION; ENSEMBLES

Citation

PHYSICAL REVIEW A, v.82, no.6

ISSN
1050-2947
DOI
10.1103/PhysRevA.82.062318
URI
http://hdl.handle.net/10203/244378
Appears in Collection
EE-Journal Papers(저널논문)
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