High-fidelity entanglement swapping with fully independent sources

Autor(en)

Rainer Kaltenbaek, Robert Prevedel, Markus Aspelmeyer, Anton Zeilinger

Abstrakt

Entanglement swapping allows one to establish entanglement between independent particles that never interacted or share any common past. This feature makes it an integral constituent of quantum repeaters. Here, we demonstrate entanglement swapping with time-synchronized independent sources with a fidelity that is high enough to violate a Clauser-Horne-Shimony-Holt inequality by more than four standard deviations. The fact that both entangled pairs are created by fully independent only electronically connected sources ensures that this technique is suitable for future long-distance quantum communication experiments as well as for novel tests on the foundations of quantum physics.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Journal

Physical Review A

Band

79

Anzahl der Seiten

4

ISSN

1050-2947

DOI

https://doi.org/10.1103/PhysRevA.79.040302

Publikationsdatum

2009

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/562207fe-627e-4162-8f8a-0c1da92d9f20