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@article{769993, author = {Ziman, Mário and Heinosaari, Teiko}, article_number = {1}, keywords = {quantum information; quantum estimation}, language = {eng}, issn = {1050-2947}, journal = {Physical Review A}, title = {Discrimination of quantum observables using limited resources}, volume = {77}, year = {2008} }
TY - JOUR ID - 769993 AU - Ziman, Mário - Heinosaari, Teiko PY - 2008 TI - Discrimination of quantum observables using limited resources JF - Physical Review A VL - 77 IS - 1 SP - 042321 EP - 042321 SN - 10502947 KW - quantum information KW - quantum estimation N2 - 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. ER -
ZIMAN, Mário a Teiko HEINOSAARI. Discrimination of quantum observables using limited resources. \textit{Physical Review A}. 2008, roč.~77, č.~1, s.~042321-42328. ISSN~1050-2947.
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