Hamburg 2009 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 18: Quanteninformation: Photonen I

Q 18.1: Talk

Tuesday, March 3, 2009, 10:30–10:45, VMP 6 HS-D

Experimental Demonstration of a Heralded Entanglement Source — •Claudia Wagenknecht, Che-Ming Li, Alexander Goebel, Yu-Ao Chen, Xiao-Hui Bao, Qiang Zhang, and Jian-Wei Pan — Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany

We present the realisation of a linear optics experiment for heralded preparation of polarisation entangled photon pairs. Our experiment relies on three pair emission from a single parametric down-conversion source, where the conditioned detection of a four photon trigger unambiguously heralds successful preparation of a maximally polarisation entangled photon pair in the output mode, ready to be used in an event ready manner. Since parametric down-conversion is a highly probabilistic process the development of a heralded source of photons will be a important step forward to overcome the randomness in all photon based experiments in quantum information processing.