Stuttgart 2012 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 12: Quanteninformation: Photonen und nichtklass. Licht
Q 12.2: Talk
Monday, March 12, 2012, 14:15–14:30, V7.02
Experimental Realization of Continuous Variable One-Way Steering — •Tobias Eberle1,2, Vitus Händchen1,2, Sebastian Steinlechner1, Aiko Samblowski1, and Roman Schnabel1 — 1Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut) und Institut für Gravitationsphysik der Leibniz Universität Hannover, Callinstraße 38, 30167 Hannover, Germany — 2Centre for Quantum Engineering and Space-Time Research - QUEST, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany
In 1935 E. Schrödinger introduced the term steering in order to describe Einstein-Podolsky-Rosen (EPR) entangled states for which a measurement on subsystem "A" may apparently allow for remote steering on the outcome of a measurement on subsystem "B" without the presence of a physical interaction between the subsystems. The EPR effect was already demonstrated by Ou et al. in 1992, however, in all experiments so far the steering effect was two-way, i.e. if Alice could steer Bob, Bob could also steer Alice. Here, we report for the first time on the realization of (continuous variable) one-way steering in which only Alice can steer Bob, but Bob cannot steer Alice, although they share the same entangled state.