Berlin 2014 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 30: Poster: Photonics, laser development and applications, ultrashort laser pulses, quantum effects

Q 30.10: Poster

Dienstag, 18. März 2014, 16:30–18:30, Spree-Palais

Reliable entanglement detection under coarse-grained measurements — •Łukasz Rudnicki1,2, Daniel Tasca3,5, Rafael Gomes3,4, Fabricio Toscano3, and Stephen Walborn31Freiburg Institute for Advanced Studies, Albert-Ludwigs University of Freiburg, Albertstrasse 19, 79104 Freiburg, Germany — 2Center for Theoretical Physics, Polish Academy of Sciences, Aleja Lotników 32/46, PL-02-668 Warsaw, Poland — 3Instituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, Rio de Janeiro, Rio de Janeiro 21941-972, Brazil — 4Instituto de Física, Universidade Federal de Goiás, 74.001-970 Goiânia, Goiás, Brazil — 5SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom

We present reliable entanglement witnesses for coarse-grained measurements on continuous variable systems. These witnesses include information about experimental coarse graining and never return a false positive conclusion for identification of entanglement. Even for the case of Gaussian states, new entanglement witnesses based on the Shannon entropy outperform those based on variances. We test our results experimentally using spatially entangled photon pairs.

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DPG-Physik > DPG-Verhandlungen > 2014 > Berlin