High-fidelity entanglement swapping with fully independent sources

Author(s): R. Kaltenbaek, R. Prevedel, M. Aspelmeyer, A. Zeilinger

Journal: Phys. Rev. A

Volume: 79

Page(s): 040302(R)

Year: 2009

DOI Number: 10.1103/PhysRevA.79.040302

Link: Link to publication

Abstract:

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.

Note: http://arxiv.org/abs/0809.3991

File: Link to PDF

Aspelmeyer Group Aspelmeyer Group , Zeilinger Group