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Q: Fachverband Quantenoptik und Photonik

Q 11: Quantum Information: Concepts and Methods II

Q 11.7: Vortrag

Montag, 8. März 2010, 18:00–18:15, E 214

Simple adaptive measurement strategies for estimation of d-dimensional quantum states — •Christof Happ and Matthias Freyberger — Institut für Quantenphysik, Universität Ulm, D-89069 Ulm

Adaptive methods improve the quality of state reconstruction when estimating unknown pure d-level-states (qudits), of which only a limited amount of copies is available. Using information from previous measurements, the adaption steps construct measurement bases for further measurements, which improve the estimation quality more than further measurements with fixed or random measurement bases. We present adaptive strategies for arbitrary finite dimensions d and discuss Monte-Carlo simulation results for complete reconstruction of the quantum state.