Mainz 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 53: Poster: Quantum Optics and Photonics III
Q 53.50: Poster
Donnerstag, 9. März 2017, 17:00–19:00, P OG2
Entangling atoms over a large distance — •Robert Garthoff1, Daniel Burchardt1, Kai Redeker1, Norbert Ortegel1, Wenjamin Rosenfeld1,2, and Harald Weinfurter1,2 — 1Ludwig-Maximilians-Universität, München — 2Max-Planck-Institut für Quantenoptik, Garching
Entanglement between widely separated quantum systems is a key resource in various quantum communication protocols. These include the recently performed conclusive tests of Bell’s inequality [1], quantum repeaters and device-independent quantum key distribution.
We present the experimental details on our system of two single Rb-87 atoms trapped in laboratories separated by a distance of 400 meters. Starting with atom-photon entanglement we employ the entanglement swapping protocol to generate heralded entanglement between the atoms. We discuss the issues of coherence time, long-term stability, quality of two-photon interference, and atomic state fidelity which are critical for using this system as a testing platform for a quantum repeater or device-independent protocols.
[1] arXiv:1611.04604 [quant-ph]