Hannover 2013 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 43: Poster II
Q 43.85: Poster
Mittwoch, 20. März 2013, 16:00–18:30, Empore Lichthof
A High-Speed Quantum Random Number Generator Based on the Vacuum State — Bastian Hacker1,2, Christian Gabriel1,2, Christoffer Wittmann1,2, Wolfgang Maurer3, Metin Sabuncu5,1, •Imran Khan1,2, Elanor Huntington4, Christoph Marquardt1,2, and Gerd Leuchs1,2 — 1Max Planck Institute for the Science of Light, 91058 Erlangen Germany — 2Institute of Optics, Information and Photonics, University Erlangen-Nuremberg, 91058 Erlangen, Germany — 3Siemens AG, Corporate Technology, 81739 Munich, Germany — 4School of Engineering and Information Technology, University College, The University of New South Wales, Canberra ACT 2600, Australia — 5Department of Electrical and Electronics Engineering, Dokuz Eylül University, Tinaztepe, Buca, 35160 Izmir, Turkey
Quantum random number generators are based on the inherent statistical nature of the quantum mechanical measurement process. In principle this allows for the extraction of unique random numbers from, in our case, a measurement of the quantum optical vacuum state. However, in practice, the detection process introduces electronic noise which modifies the measured signal. We apply spectral filtering to get rid of parasitic frequencies and apply a special binning technique to convert the measured signal to a string of random bits. We then evaluate the entropy of each frequency bin. Later, a one-way hashing function may be applied to limit the information content to quantum effects. A high-speed detector and the new bit extraction method allow for a random bit extraction speed in the GBit/s range.