Long-Distance Free-Space Distribution of Quantum Entanglement

Author(s): M. Aspelmeyer, H. R. Böhm, T. Gyatso, T. Jennewein, R. Kaltenbaek, M. Lindenthal, G. Molina-Terriza, A. Poppe, K. J. Resch, M. Taraba, R. Ursin, P. Walther, A. Zeilinger

Journal: Science

Volume: 301

Page(s): 621-623

Year: 2003

DOI Number: 10.1126/science.1085593

Link: Link to publication


We demonstrate the distribution of quantum entanglement via optical free-space links to independent receivers separated by 600 m, with no line of sight between each other. A Bell inequality between those receivers is violated by more than four standard deviations, confirming the quality of the entanglement. This outdoor experiment represents a step toward satellite-based distributed quantum entanglement.

Aspelmeyer Group Aspelmeyer Group , Walther Group , Zeilinger Group , Ursin Group