Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 59: Quantum information: Quantum computers and communication I
Q 59.6: Vortrag
Freitag, 21. März 2014, 11:45–12:00, DO26 207
Reconstruction of continuous variable quantum squeezed states after passing a fading atmospheric channel — •Christian Peuntinger1,2, Bettina Heim1,2, Christian Müller1,2, 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 investigate the distribution of continuous variable squeezed states through a turbulent atmospheric channel of 1.6 km length in an urban environment. As polarization encoding is well suited for atmospheric transmission we use bright polarization squeezed states of light. Still atmospheric turbulence leads to fluctuating transmission values and this has to be taken into account at the detection. Thus, we developed a post-selection protocol using the classical side information drawn from the respective channel transmission. By this we retrace the intensity fluctuations and are able to perform a quantum state reconstruction of the received signals based on a maximum likelihood algorithm.