Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 41: Quantum Information: Concepts and Methods VI
Q 41.4: Vortrag
Donnerstag, 9. März 2017, 12:00–12:15, P 2
Measurement-device-independent randomness generation with arbitrary quantum states — •Felix Bischof, Hermann Kampermann, and Dagmar Bruß — Institut für Theoretische Physik III, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany
Measurements of quantum systems can be used to generate classical data that is truly unpredictable for every observer. However, this true randomness needs to be discriminated from randomness due to ignorance or lack of control of the devices. At the same time, the number of assumptions and explicit modeling of the devices should be low to guarantee the safety and practicality of the scheme.
We analyze the randomness gain of a measurement-device-independent setup, consisting of a well-characterized source and completely uncharacterized detector. Our framework generalizes previous schemes1 as it quantifies the randomness generation for any implementation: arbitrary input states, and detectors with an arbitrary number of outcomes can be analyzed. Our method is used to suggest simple and realistic implementations that yield high randomness generation rates of more than one random bit per qubit for detectors of sufficient quality.
1 Z. Cao, H. Zhou, and X. Ma (2015)