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Q: Quantenoptik und Photonik

Q 75: Poster Quanteninformation

Q 75.9: Poster

Donnerstag, 16. März 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).