Heidelberg 2015 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 59: Quantum Information: Quantum Communication I
Q 59.3: Vortrag
Donnerstag, 26. März 2015, 15:15–15:30, K/HS1
Towards entanglement of two single trapped atoms over a distance of 400 m — Daniel Burchardt1, Kai Redeker1, Robert Garthoff1, Norbert Ortegel1, •Wenjamin Rosenfeld1,2, and Harald Weinfurter1,2 — 1Ludwig-Maximilians-Universität, München — 2Max-Planck-Institut für Quantenoptik, Garching
Entanglement between atomic quantum memories separated by large distances will be a key resource for future applications in quantum communication including the quantum repeater.
Here we present our current progress on establishing heralded entanglement between two single Rb-87 atoms over a distance of 400 meter. Based on our previous work over a shorter distance [1] we implemented the steps necessary for extending the separation between the atomic traps by more than one order of magnitude. Moreover we incorporated a scheme for fast and efficient state detection on single atoms. Together, this also forms the basis for a loophole-free test of Bell's inequality and device-independent quantum key distribution.
[1] J. Hofmann et al., Science 337, 72 (2012).