Stuttgart 2012 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 8: Quanteninformation: Konzepte und Methoden 2
Q 8.2: Talk
Monday, March 12, 2012, 14:15–14:30, V38.04
Detecting entanglement in spatial interference — Clemens Gneiting1 and •Klaus Hornberger2 — 1Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg — 2Universität Duisburg-Essen, Lotharstr. 1-21, 47057 Duisburg
We discuss an experimentally amenable class of two-particle states of motion giving rise to nonlocal spatial interference under position measurements. Using the concept of modular variables, we derive a separability criterion which is violated by these non-Gaussian states. While we focus on the free motion of material particles, the presented results are valid for any pair of canonically conjugate continuous variable observables and should apply to a variety of bipartite interference phenomena.