Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 59: Quantum Information: Atoms and Ions IV / Photons and Nonclassical Light II
Q 59.3: Vortrag
Freitag, 12. März 2010, 11:00–11:15, E 214
Quantum interference of photon pairs emitted by two remotely trapped atoms — •Julian Hofmann1, Christoph Kurz1, Michael Krug1, Florian Henkel1, Wenjamin Rosenfeld1, Markus Weber1, and Harald Weinfurter1,2 — 1Fakultät für Physik der Ludwigs-Maximilians-Universität, München — 2Max-Planck-Institut für Quantenoptik, Garching
Entanglement of two remotely trapped atoms is a key element in long distance quantum communication - leading to applications like quantum repeaters and a future loophole-free test of Bell's inequality. One method to entangle two remote atoms is entanglement-swapping. A basic requirement for this protocol is quantum interference of photon pairs on a beam-splitter, where each photon is entangled with an atom respectively.
So far we demonstrated atom-photon entanglement generation in two independent experiments as well as long distance atom-photon entanglement distribution [1,2]. In order to achieve two photon inference with high fidelity both experiments have to be synchronised on a sub-nanosecond timescale.
Here we report on recent progress towards quantum interference of photon pairs emitted by two independent atoms and progress towards verification of atom-atom entanglement.