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Opt Express. 2008 Apr 14;16(8):5776-81.

Distribution of time-energy entanglement over 100 km fiber using superconducting single-photon detectors.

Author information

  • 1Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA. qiangzh@stanford.edu

Abstract

In this letter, we report an experimental realization of distributing entangled photon pairs over 100 km of dispersion-shifted fiber. In the experiment, we used a periodically poled lithium niobate waveguide to generate the time-energy entanglement and superconducting single-photon detectors to detect the photon pairs after 100 km. We also demonstrate that the distributed photon pairs can still be useful for quantum key distribution and other quantum communication tasks.

PMID:
18542687
[PubMed - indexed for MEDLINE]
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