Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 34: Quantum Information (Quantum Communication) I
Q 34.2: Vortrag
Mittwoch, 13. März 2019, 14:15–14:30, S HS 002 Chemie
Quantum randomness based on single photon anti-bunching — •Xing Chen1, Jörg Wrachtrup1,2, and Ilja Gerhardt1,2 — 13. Institute of Physics, University of Stuttgart and Institute for Quantum Science and Technology, IQST, Pfaffenwaldring 57, D-70569 Stuttgart, Germany — 2Max Planck Institute for Solid State Research, Heisenbergstraße 1, D-70569 Stuttgart, Germany
The generation of quantum randomness has often be taken for granted, when, for example, laser photons impinge on a beam-splitter. Unfortunately, a large number of assumptions are applied to label this process as a quantum process. While true ``loop-hole free'' experiments [1] are hard to implement, an intermediate version might deliver the proof if a measurement is based on a quantum process. Here we present our approach to bind the amount of true randomness on a measure of the non-classicality of a single photon stream. Our experimental implementation is based on a single NV-center and the generated single photons impinge on a beam splitter -- the outcome of clicks on two single photon detectors is interpreted as ones and zeros. The non-classicality of the stream is testified by an anti-bunching measurement [2], and gives an entropy bound on the quantumness of the generated random numbers.
References: [1] S. Pironio, A. Acin, S. Massar, A. B. de la Giroday, D. N. Matsukevich, P. Maunz, S. Olmschenk, D. Hayes, L. Luo, T. A. Manning, et al., Nature 464, 1021 (2010), ISSN 0028-0836, URL http://dx.doi.org/10. 1038/nature09008. [2] H. Paul, Rev. Mod. Phys. 54, 1061 (1982), URL https://link.aps.org/doi/10.1103/RevModPhys.54.1061.