B. Blauensteiner

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We have distributed entangled photons directly through the atmosphere to a receiver station 7.8 km away over the city of Vienna, Austria at night. Detection of one photon from our entangled pairs constitutes a triggered single photon source from the sender. With no direct time-stable connection, the two stations found coincidence counts in the detection(More)
We implement an entanglement distribution network based on wavelength-multiplexing and optical switching for quantum communication applications. Using a high-brightness source based on spontaneous parametric down-conversion in periodically-poled lithium niobate waveguides, we generate polarisation entangled photon pairs with a broad spectrum covering the(More)
We demonstrate non-degenerate down-conversion at 810 and 1550 nm for long-distance fiber based quantum communication using polarization entangled photon pairs. Measurements of the two-photon visibility, without dark count subtraction, have shown that the quantum correlations (raw visibility 89%) allow secure quantum cryptography after 100 km of non-zero(More)
Interference of photons emerging from independent sources is essential for modern quantum-information processing schemes, above all quantum repeaters and linear-optics quantum computers. We report an observation of nonclassical interference of two single photons originating from two independent, separated sources, which were actively synchronized with a rms(More)
3 Max-Planck-Institut für Quantenoptik, D-85748 Garching, Germany 4 Department für Physik, Ludwig-Maximilians University, D-80799 Munich, Germany 5 European Space Agency, 2200 AG Noordwijk, The Netherlands 6 Business Unit Quantum Technology, ARC Seibersdorf Research GmbH, A-1220 Vienna, Austria 7 Department of Electrical and Electronic Engineering,(More)
During a screening for new microbial α-glucan phosphorylases corynebacteria were found to be promising, not-yet-identified producers of these particular enzymes. A maltodextrin phosphorylase (MDP) from Corynebacterium callunae was isolated, partially characterized, and used for the production of glucose-1-phosphate (G-1-P) from different α-glucans. In(More)
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