Berlin 2005 – scientific programme
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Q: Quantenoptik und Photonik
Q 3: Poster Quanteninformation, -kommunikation und Quantencomputer
Q 3.10: Poster
Friday, March 4, 2005, 11:00–12:30, Poster HU
Programmable discrimination for unknown qudit states — •Stefan T. Probst-Schendzielorz1, Matthias Freyberger1, János Bergou2, and Igor Jex3 — 1Abteilung für Quantenphysik, Universität Ulm, 89069 Ulm — 2Department of Physics, CUNY Hunter College, 695 Park Avenue, New York, NY 10021, USA — 3Department of Physics, FNSPE, Czech Technical University Prague, Brehova 7, 115 19 Praha, Czech Republic
Unambiguous discrimination of two unknown quantum states, especially if they are non-orthogonal, is a challenging problem. But if there are copies of the states provided, the discrimination of the states is possible based on symmetry arguments. We present a POVM for this scheme generalized for d-dimensional systems. To optimize our POVM, we need to know the occurrence probabilities. Therefore, we adapt stepwise the parameters of the POVM and compare this to projection measurements.