Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 25: Quantum Information: Quantum Communication I
Q 25.6: Vortrag
Mittwoch, 10. März 2010, 11:45–12:00, E 214
Quantum Random Numbers Based on the Vacuum State — •Christian Gabriel1,2, Christoffer Wittmann1,2, Denis Sych1,2, Ruifang Dong1,2, Wolfgang Mauerer3, Ulrik L. Andersen1,2,4, Christoph Marquardt1,2, and Gerd Leuchs1,2 — 1Max Planck Institute for the Science of Light, Guenther-Scharowsky-Str. 1, 91058 Erlangen, Germany — 2Institute for Optics, Information and Photonics, University Erlangen-Nuremberg, Staudtstr. 7/B2, 91058 Erlangen, Germany — 3Siemens AG, Corporate Technology, Otto-Hahn-Ring 6, 81739 Munich, Germany — 4Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
We present a random number generator (RNG) based on the measurement of a quadrature amplitude of a pure quantum state, namely the vacuum state. By determining the entropy of the system and applying a suitable one-way function it can be assured that the random numbers originate from quantum noise solely and classical noise sources have no influence on the generated bit sequences. As quantum mechanics postulates completely random measurement outcomes, the generated numbers are truly random. The optimized information capacity of the system is determined, leading to increased bit generation speeds. Furthermore, the random numbers are assured to be unique, i.e. they cannot be known by an adversary. This is guaranteed by the measurement of a pure state. This feature makes our RNG advantageous to many earlier generators as it offers not only a truly random but also a secure generation of bits.