Hannover 2013 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 35: Poster I
Q 35.93: Poster
Dienstag, 19. März 2013, 16:00–18:30, Empore Lichthof
Experimental Investigation of Quantum Correlations in Multipartite Systems — •Vanessa Chille1,2, Christian Peuntinger1,2, Ladislav Mista4, Niall Quinn3, Natalia Korolkova3, Christoph Marquardt1,2, and Gerd Leuchs1,2 — 1Max Planck Institute for the Science of Light, Günther-Scharowsky-Straße 1, 91058 Erlangen, Germany — 2Institute of Optics, Information and Photonics, University Erlangen-Nuremberg, Germany — 3School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, United Kingdom — 4Deparment of Optics, Palacky University, 17. listopadu 50, 772 07 Olomouc, Czech Republic
We study quantum correlations in a dissipative quantum system. A special focus lies on quantum discord and entanglement. A two-mode Gaussian mixed state is prepared by modulating a polarization squeezed state and mixing it with the vacuum mode. We measure the covariance matrix in dependence on the dissipation in one of the modes and examine the amount of quantum discord. The quantum discord changes as a side effect of the changes in local entropy caused by the dissipation which corresponds to a coupling of the system to the environment. These experiments serve also as a preparatory study for the experimental implementation of a distribution of continuous-variable entanglement by separable Gaussian states. The scheme uses quantum discord to distribute entanglement between two distant modes by a third separable auxiliary mode.