Title :
Long distance entanglement swapping and perspectives for a real quantum relay
Author :
de Riedmatten, H. ; Halder, Matthäus ; van Houwelingen, J.A.W. ; Tanzill, Sebastien ; Beveratos, A. ; Tittel, W. ; Zbinden, H. ; Gisin, N.
Author_Institution :
Group of Appl. Phys., Geneva Univ., Switzerland
Abstract :
Entanglement swapping of time-bin qubits over a distance of 1.1 km was demonstrated. The visibility of the 4-fold coincidences conditioned on a successful Bell state measurement was 75.5%±5%, clearly indicating that the photons were entangled and could violate Bell inequalities (visibility of 70.7%). This latest results confirm that time-bin encoding is robust enough against several decoherence effects in optical fibers.
Keywords :
Bell theorem; encoding; quantum entanglement; quantum optics; 1.1 km; Bell inequality violation; Bell state measurement; decoherence; entanglement swapping; quantum relay; time-bin encoding; Coherence; Optical fiber losses; Optical fibers; Optical waveguides; Physics; Protective relaying; Quantum entanglement; Relays; Stimulated emission; Teleportation;
Conference_Titel :
Quantum Electronics Conference, 2005. EQEC '05. European
Print_ISBN :
0-7803-8973-5
DOI :
10.1109/EQEC.2005.1567482
