Hannover 2016 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 11: Poster: Quantum Optics and Photonics I
Q 11.32: Poster
Monday, February 29, 2016, 16:30–19:00, Empore Lichthof
Detection of quantum correlations of light without quantum discord or entanglement — •Tom Ettrich1, Semjon Köhnke1, Melanie Mraz1, Elizabeth Agudelo Ospina2, Jan Sperling2, Werner Vogel2, and Boris Hage1 — 1AG Experimentelle Quantenoptik, Institut für Physik, Universität Rostock, Rostock, Germany — 2AG Theoretische Quantenoptik, Institut für Physik, Universität Rostock, Rostock, Germany
We give a brief overview of the experimental requirements for the preparation and verification by measurement of Einstein-Podolsky-Rosen (EPR) entanglement based on two squeezed vacuum states generated by optical parametric amplifiers (OPA).
By applying carefully generated phase-randomization with a uniform distribution to the mutual phase of the bipartite state both quantum discord and entanglement vanish for a particular range of parameters. However, the method developed by our theoretical colleagues of the group of W. Vogel provides the means to construct a filtered regularised multimode Glauber-Sudarshan P function from measured homodyne data, which contains negativities and therefore does show quantum correlation.