Hannover 2013 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 43: Poster II
Q 43.79: Poster
Mittwoch, 20. März 2013, 16:00–18:30, Empore Lichthof
Distribution of squeezed states over an atmospheric channel — •Christian Peuntinger1,2, Bettina Heim1,2, Christian Gabriel1,2, Christoph Marquardt1,2, and Gerd Leuchs1,2 — 1Max-Planck-Institut für die Physik des Lichts, Günther-Scharowsky-Str. 1 / Bau 24, 91058 Erlangen, Deutschland — 2Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstr. 7 / B2, 91058 Erlangen, Deutschland
We experimentally investigate the transmission of squeezing through an atmospheric channel of 1.6 km length in an urban environment. At the sender we prepare bright polarization squeezed states of light with a noise reduction of almost 3 dB relative to shot noise. We use polarization encoding as it is well suited for atmospheric transmission. We also apply a purification protocol taking into account the channel transmission to counteract the channel fluctuations. Thus we observe 1 dB of squeezing at the receiver, which is in good agreement with the attenuation of the channel.