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Q: Quantenoptik und Photonik

Q 7: Quantenkommunikation

Q 7.5: Talk

Monday, March 22, 2004, 17:30–17:45, HS 101

A Compact Source for Polarization Entangled Photon Pairs — •Hannes Böhm¹, Andreas Poppe¹, Markus Aspelmeyer¹, Thomas Jennewein¹, and Anton Zeilinger^1,2 — ¹Institut fuer Experimentalphysik, University of Vienna, Austria — ²Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences

We present a compact source for polarization-entangled photon pairs based on spontaneous parametric down-conversion (SPDC). Its small size, low power consumption and high efficiency make it a versatile tool for quantum communication experiments. In a recent outdoor experiment it was used to demonstrate the distribution of entanglement between two independent observers separated by 600m using optical free space links.