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Q: Quantenoptik und Photonik
Q 75: Poster Quanteninformation
Q 75.9: Poster
Thursday, March 16, 2006, 16:30–18:30, Labsaal
Experimental squeezing distillation — •Ruifang Dong1, Joel Heersink1, Christoph Marquardt1, Maria Chekhova2, Radim Filip1, Stefan Lorenz1, Gerd Leuchs1, and Ulrik Andersen1 — 1Institute for Optics, Information and Photonics,Max-Planck Researchgroup, University Erlangen-Nuernberg, Guenther-Scharowsky-Str. 1, 91058, Erlangen,Germany — 2Department of Physics, M.V. Lomonosov Moscow State University, 119992, Moscow, Russia
We report on the first experimental distillation of non-classical, continuous variable mixed states. These states are based on Gaussian intense polarization squeezed states [1], our quantum resource, which are subject to a non-Gaussian noise source. Such noise may arise from phase kicks caused by either a noisy channel or by intrinsic phase jitter in the squeezing source. Experimentally this is implemented by an appropriate phase shift to the beam before or after feeding it into the polarization squeezer. In the distillation protocol a small portion of the corrupted resource is tapped off and a measurement is performed along the quadrature exhibiting maximal modulation. Conditioned on the resulting measurement outcome the remaining state is either accepted or discarded, hereby accomplishing a probabilistic distillation of the noisy signal, and a recovery of the original quantum resource, the squeezing, is obtained. [1] J. Heersink et al, Opt. Lett., Vol.30, 1192 (2005).