[Zurück]

Z.-B. Chen, B. Zhao, Y.-A. Chen, H.-J. Schmiedmayer, J.-W. Pan:
"Fault-tolerant quantum repeater with atomic ensembles and linear optics";
Physical Review A, 76 (2007), S. 022329-1 - 022329-12.

We present a detailed analysis of a robust quantum repeater architecture building on the original Duan-
Lukin-Cirac-Zoller DLCZ protocol L.M. Duan et al. Nature London 414, 413 2001 . The architecture is
based on two-photon Hong-Ou-Mandel-type interference which relaxes the long-distance interferometric stability
requirements by about seven orders of magnitude, from subwavelength for the single photon interference
required by DLCZ to the coherence length of the photons, thereby removing the weakest point in the DLCZ
scheme. Our proposal provides an exciting possibility for robust and realistic long-distance quantum
communication.