Distributing entanglement and single photons through an intra-city, free-space quantum channel
- Author(s)
- K. J. Resch, M. Lindenthal, Bibiane Blauensteiner, Hannes Böhm, A. Fedrizzi, M. Taraba, R. Ursin, P. Walther, A. Poppe, T. Schmitt-Manderbach, H. Weier, H. Weinfurter, A. Zeilinger
- Abstract
Entangled photons are distributed directly through the atmosphere to a receiver station 7.8 km away at night over the city center of Vienna, Austria. Without a time-stable connection, the two stations found coincidence counts in the detection events through the cross-correlation of locally-recorded time stamps shared over a public Internet channel. As such, the sending and receiver stations were completely independent. The polarization correlations contained in the measured time tags are sufficient to convincingly violate a CHSH-Bell inequality and demonstrate entanglement between the two city buildings.
- Organisation(s)
- External organisation(s)
- Österreichische Akademie der Wissenschaften (ÖAW), Ludwig-Maximilians-Universität München
- Volume
- 2005
- Pages
- 298
- No. of pages
- 1
- DOI
- https://doi.org/10.1109/EQEC.2005.1567464
- Publication date
- 2005
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103026 Quantum optics
- ASJC Scopus subject areas
- Engineering(all)
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/distributing-entanglement-and-single-photons-through-an-intracity-freespace-quantum-channel(c7ba3d4c-81f3-46c5-96fc-ba62962ad17e).html