Hamburg 2009 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 13: Quanteninformation: Konzepte III

Q 13.2: Talk

Monday, March 2, 2009, 16:45–17:00, VMP 6 HS-D

Detection of entanglement with high statistical significance — •Sönke Niekamp, Bastian Jungnitsch, Matthias Kleinmann, and Otfried Gühne — Institut für Quantenoptik und Quanteninformation, Technikerstraße 21a, 6020 Innsbruck, Austria

A witness operator is a tool which allows to verify whether a given state is entangled. In a typical experiment, only a limited number of copies of the entangled state is available for this task. In order to detect entanglement with high certainty, it is therefore of advantage to decrease the statistical error involved in the measurement of the witness.

We investigate strategies to improve witness operators in order to minimize the error, focusing on experiments with trapped ions.