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Q: Fachverband Quantenoptik und Photonik

Q 54: Quantum Information: Quantum Computing and Communication II

Q 54.1: Vortrag

Donnerstag, 3. März 2016, 14:30–14:45, e214

Measurement-device-independent randomness generation — •Felix Bischof, Hermann Kampermann, and Dagmar Bruß — Institut für Theoretische Physik III, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany

The inherent unpredictability of quantum measurements provides a way to generate true objective randomness. However, the presence of unavoidable noise in any realistic setting requires careful separation of quantum randomness from classical pseudo-randomness. At the same time, the number of assumptions and explicit modelling of the devices should be low for any safe and practical scheme.

We introduce and analyze a measurement-device-independent scheme to generate true randomness with few assumptions: trusted sending devices send out qubit signals inside a secure laboratory. Upon receiving the signals, an uncharacterized measurement apparatus outputs classical bits, the raw random numbers. The observed measurement statistics is then used to quantify the amount of true randomness, independent of the inner working of the measurement device.