Hamburg 2009 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 30: Poster II

Q 30.36: Poster

Tuesday, March 3, 2009, 16:30–19:00, VMP 9 Poster

Quantum Random Number Generator Using Homodyne Detection — •Christian Gabriel¹, Ruifang Dong¹, Christoffer Wittmann¹, Christoph Marquardt¹, Ulrik L. Andersen^1,2, and Gerd Leuchs¹ — ¹MPI für die Physik des Lichts, Institut für Optik, Information und Photonik, Universität Erlangen-Nürnberg, Günther-Scharowsky-Strasse 1, 91058 Erlangen, Germany — ²Department of Physics, Technical University of Denmark, Building 309, 2800 Lyngby, Denmark

True random number generators are essential for quantum key distribution systems. We investigate a quantum random number generator using homodyne detection. For this we compare measured data of anti-squeezed, squeezed and coherent beams, and analyze the randomness of the signals with various standardized test suits. In addition, we exploit the continuous variable nature of the states to extract more bits per measurement value than in usually used single photon counting methods.