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Masaryk University

Publication details

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Discrimination of quantum observables

Basic information
Original title:	Discrimination of quantum observables
Author:	Mário Ziman

Further information
Citation:	ZIMAN, Mário. Discrimination of quantum observables. 2008. invited talk.
Original language:	English
Field:	Information theory
Type:	Vyžádané přednášky
Keywords:	quantum information; quantum estimation

We address the problem of unambiguous discrimination and identification among quantum observables. We set a general framework and investigate in details the case of qubit observables. In particular, we show that perfect discrimination with two shots is possible only for sharp qubit observables (e.g. Stern-Gerlach apparatuses) associated with mutually orthogonal directions. We also show that for sharp qubit observables associated to nonorthogonal directions unambiguous discrimination with an inconclusive result is always possible.

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