Dresden 2011 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 59: Quantum Effects: Interference and Correlations

Q 59.8: Vortrag

Freitag, 18. März 2011, 12:15–12:30, SCH A01

Single photon sources: the disastrous second photon — •Karl Otto Greulich — Fritz Lipmann Institute Beutenbergstr.11 D 07745 Jena

Double - and triple - slit experiments for confirming wave particle properties of light, or experiments on entanglement for proving non - locality strictly require single photons or single photon pairs. Often multiatom light sources such as pump lasers are involved and it is assumed that the attenuation is sufficient to safely work in the single photon limit. A few pulses containing a second photon cannot be definitely excluded, but this is often thought to be acceptable. Detailed numerical evaluation quantifies the risk that contaminating second photons may invalidate interpretations of, at least, non - locality experiments - and perhaps also single photon double slit experiments.

1 K.O. Greulich Single molecule experiments challenge the strict wave particle dualism of light 2010 Int J Mol Sci, 11, 304 - 311

2 K.O. Greulich Another loophole for Bell inequalities 2009 Proc. SPIE 2009 7421 2301-2307

3 http://www.fli-leibniz.de/www_kog/ Then click the symbol for Physics